class TestSpecialEuclideanMatrixCanonicalRightMetric(
RiemannianMetricTestCase,
metaclass=Parametrizer,
):
metric = connection = InvariantMetric
skip_test_exp_geodesic_ivp = True
skip_test_exp_shape = np_backend()
skip_test_log_shape = np_backend()
skip_test_parallel_transport_ivp_is_isometry = True
skip_test_parallel_transport_bvp_is_isometry = True
skip_test_squared_dist_is_symmetric = np_backend()
skip_test_log_after_exp = True
skip_test_exp_after_log = True
skip_test_log_is_tangent = np_backend()
skip_test_geodesic_bvp_belongs = np_backend()
skip_test_exp_ladder_parallel_transport = np_backend()
skip_test_geodesic_ivp_belongs = True
skip_test_exp_belongs = np_backend()
skip_test_squared_dist_is_symmetric = True
skip_test_dist_is_norm_of_log = True
skip_test_dist_is_positive = np_backend()
skip_test_dist_is_symmetric = True
skip_test_dist_point_to_itself_is_zero = True
skip_test_squared_dist_is_positive = np_backend()
testing_data = SpecialEuclideanMatrixCanonicalRightMetricTestData()
def test_right_exp_coincides(self, n, initial_vec):
group = SpecialEuclidean(n=n)
vector_group = SpecialEuclidean(n=n, point_type="vector")
initial_matrix_vec = group.lie_algebra.matrix_representation(
initial_vec)
vector_exp = vector_group.right_canonical_metric.exp(initial_vec)
result = group.right_canonical_metric.exp(initial_matrix_vec,
n_steps=25)
expected = vector_group.matrix_from_vector(vector_exp)
self.assertAllClose(result, expected, atol=1e-6)
class TestInvariantMetric(RiemannianMetricTestCase, metaclass=Parametrizer):
metric = connection = InvariantMetric
skip_test_parallel_transport_ivp_is_isometry = True
skip_test_parallel_transport_bvp_is_isometry = True
skip_test_exp_geodesic_ivp = True
skip_test_exp_shape = np_backend()
skip_test_geodesic_ivp_belongs = True
skip_test_exp_ladder_parallel_transport = np_backend()
skip_test_log_is_tangent = np_backend()
skip_test_log_shape = np_backend()
skip_test_geodesic_bvp_belongs = np_backend()
skip_test_exp_after_log = np_backend() or autograd_backend()
skip_test_geodesic_bvp_belongs = True
skip_test_log_after_exp = True
skip_test_dist_point_to_itself_is_zero = np_backend()
testing_data = InvariantMetricTestData()
def test_inner_product_mat_at_identity_shape(self, group,
metric_mat_at_identity,
left_or_right):
metric = self.metric(group, metric_mat_at_identity, left_or_right)
dim = metric.group.dim
result = metric.metric_mat_at_identity
self.assertAllClose(gs.shape(result), (dim, dim))
def test_inner_product_matrix_shape(self, group, metric_mat_at_identity,
left_or_right, base_point):
metric = self.metric(group, metric_mat_at_identity, left_or_right)
base_point = None
dim = metric.group.dim
result = metric.metric_matrix(base_point=base_point)
self.assertAllClose(gs.shape(result), (dim, dim))
base_point = group.identity
dim = metric.group.dim
result = metric.metric_matrix(base_point=base_point)
self.assertAllClose(gs.shape(result), (dim, dim))
def test_inner_product_matrix_and_its_inverse(self, group,
metric_mat_at_identity,
left_or_right):
metric = self.metric(group, metric_mat_at_identity, left_or_right)
inner_prod_mat = metric.metric_mat_at_identity
inv_inner_prod_mat = gs.linalg.inv(inner_prod_mat)
result = gs.matmul(inv_inner_prod_mat, inner_prod_mat)
expected = gs.eye(group.dim)
self.assertAllClose(result, expected)
@geomstats.tests.np_autograd_and_torch_only
def test_inner_product(
self,
group,
metric_mat_at_identity,
left_or_right,
tangent_vec_a,
tangent_vec_b,
base_point,
expected,
):
metric = self.metric(group, metric_mat_at_identity, left_or_right)
result = metric.inner_product(tangent_vec_a, tangent_vec_b, base_point)
self.assertAllClose(result, expected)
def test_structure_constant(self, group, tangent_vec_a, tangent_vec_b,
tangent_vec_c, expected):
metric = InvariantMetric(group=group)
result = metric.structure_constant(tangent_vec_a, tangent_vec_b,
tangent_vec_c)
self.assertAllClose(result, expected)
def test_dual_adjoint_structure_constant(self, group, tangent_vec_a,
tangent_vec_b, tangent_vec_c):
metric = InvariantMetric(group=group)
result = metric.inner_product_at_identity(
metric.dual_adjoint(tangent_vec_a, tangent_vec_b), tangent_vec_c)
expected = metric.structure_constant(tangent_vec_a, tangent_vec_c,
tangent_vec_b)
self.assertAllClose(result, expected)
def test_connection(self, group, tangent_vec_a, tangent_vec_b, expected):
metric = InvariantMetric(group)
self.assertAllClose(metric.connection(tangent_vec_a, tangent_vec_b),
expected)
def test_connection_translation_map(self, group, tangent_vec_a,
tangent_vec_b, point, expected):
metric = InvariantMetric(group)
translation_map = group.tangent_translation_map(point)
tan_a = translation_map(tangent_vec_a)
tan_b = translation_map(tangent_vec_b)
result = metric.connection(tan_a, tan_b, point)
expected = translation_map(expected)
self.assertAllClose(result, expected, rtol=1e-3, atol=1e-3)
def test_sectional_curvature(self, group, tangent_vec_a, tangent_vec_b,
expected):
metric = InvariantMetric(group)
result = metric.sectional_curvature(tangent_vec_a, tangent_vec_b)
self.assertAllClose(result, expected)
def test_sectional_curvature_translation_point(self, group, tangent_vec_a,
tangent_vec_b, point,
expected):
metric = InvariantMetric(group)
translation_map = group.tangent_translation_map(point)
tan_a = translation_map(tangent_vec_a)
tan_b = translation_map(tangent_vec_b)
result = metric.connection(tan_a, tan_b, point)
expected = translation_map(expected)
self.assertAllClose(result, expected)
def test_curvature(self, group, tangent_vec_a, tangent_vec_b,
tangent_vec_c, expected):
metric = InvariantMetric(group)
result = metric.curvature(tangent_vec_a,
tangent_vec_b,
tangent_vec_c,
base_point=None)
self.assertAllClose(result, expected)
def test_curvature_translation_point(self, group, tangent_vec_a,
tangent_vec_b, tangent_vec_c, point,
expected):
metric = InvariantMetric(group)
translation_map = group.tangent_translation_map(point)
tan_a = translation_map(tangent_vec_a)
tan_b = translation_map(tangent_vec_b)
tan_c = translation_map(tangent_vec_c)
result = metric.curvature(tan_a, tan_b, tan_c, point)
expected = translation_map(expected)
self.assertAllClose(result, expected)
def test_curvature_derivative_at_identity(
self,
group,
tangent_vec_a,
tangent_vec_b,
tangent_vec_c,
tangent_vec_d,
expected,
):
metric = self.metric(group)
result = metric.curvature_derivative(tangent_vec_a, tangent_vec_b,
tangent_vec_c, tangent_vec_d)
self.assertAllClose(result, expected)
def test_curvature_derivative_tangent_translation_map(
self,
group,
tangent_vec_a,
tangent_vec_b,
tangent_vec_c,
tangent_vec_d,
base_point,
expected,
):
metric = InvariantMetric(group=group)
translation_map = group.tangent_translation_map(base_point)
tan_a = translation_map(tangent_vec_a)
tan_b = translation_map(tangent_vec_b)
tan_c = translation_map(tangent_vec_c)
tan_d = translation_map(tangent_vec_d)
result = metric.curvature_derivative(tan_a, tan_b, tan_c, tan_d,
base_point)
self.assertAllClose(result, expected)
def test_integrated_exp_at_id(
self,
group,
):
metric = InvariantMetric(group=group)
basis = metric.normal_basis(group.lie_algebra.basis)
vector = gs.random.rand(2, len(basis))
tangent_vec = gs.einsum("...j,jkl->...kl", vector, basis)
identity = group.identity
result = metric.exp(tangent_vec, identity, n_steps=100, step="rk4")
expected = group.exp(tangent_vec, identity)
self.assertAllClose(expected, result, atol=1e-4)
result = metric.exp(tangent_vec, identity, n_steps=100, step="rk2")
self.assertAllClose(expected, result, atol=1e-4)
def test_integrated_se3_exp_at_id(self, group):
lie_algebra = group.lie_algebra
metric = InvariantMetric(group=group)
canonical_metric = group.left_canonical_metric
basis = metric.normal_basis(lie_algebra.basis)
vector = gs.random.rand(len(basis))
tangent_vec = gs.einsum("...j,jkl->...kl", vector, basis)
identity = group.identity
result = metric.exp(tangent_vec, identity, n_steps=100, step="rk4")
expected = canonical_metric.exp(tangent_vec, identity)
self.assertAllClose(expected, result, atol=1e-4)
result = metric.exp(tangent_vec, identity, n_steps=100, step="rk2")
self.assertAllClose(expected, result, atol=1e-4)
@geomstats.tests.autograd_tf_and_torch_only
def test_integrated_exp_and_log_at_id(self, group):
metric = InvariantMetric(group=group)
basis = group.lie_algebra.basis
vector = gs.random.rand(2, len(basis))
tangent_vec = gs.einsum("...j,jkl->...kl", vector, basis)
identity = group.identity
exp = metric.exp(tangent_vec, identity, n_steps=100, step="rk4")
result = metric.log(exp,
identity,
n_steps=15,
step="rk4",
verbose=False)
self.assertAllClose(tangent_vec, result, atol=1e-5)
def test_integrated_parallel_transport(self, group, n, n_samples):
metric = InvariantMetric(group=group)
point = group.identity
tan_b = Matrices(n + 1, n + 1).random_point(n_samples)
tan_b = group.to_tangent(tan_b)
# use a vector orthonormal to tan_b
tan_a = Matrices(n + 1, n + 1).random_point(n_samples)
tan_a = group.to_tangent(tan_a)
coef = metric.inner_product(tan_a, tan_b) / metric.squared_norm(tan_b)
tan_a -= gs.einsum("...,...ij->...ij", coef, tan_b)
tan_b = gs.einsum("...ij,...->...ij", tan_b,
1.0 / metric.norm(tan_b, base_point=point))
tan_a = gs.einsum("...ij,...->...ij", tan_a,
1.0 / metric.norm(tan_a, base_point=point))
expected = group.left_canonical_metric.parallel_transport(
tan_a, point, tan_b)
result, end_point_result = metric.parallel_transport(
tan_a, point, tan_b, n_steps=20, step="rk4", return_endpoint=True)
expected_end_point = metric.exp(tan_b, point, n_steps=20)
self.assertAllClose(end_point_result,
expected_end_point,
atol=gs.atol * 1000)
self.assertAllClose(expected, result, atol=gs.atol * 1000)
def test_log_antipodals(self, group, rotation_mat1, rotation_mat2,
expected):
with expected:
group.bi_invariant_metric.log(rotation_mat1, rotation_mat2)
@geomstats.tests.np_autograd_and_tf_only
def test_left_exp_and_exp_from_identity_left_diag_metrics(
self, metric_args, point):
metric = self.metric(*metric_args)
left_exp_from_id = metric.left_exp_from_identity(point)
exp_from_id = metric.exp_from_identity(point)
self.assertAllClose(left_exp_from_id, exp_from_id)
@geomstats.tests.np_autograd_and_tf_only
def test_left_log_and_log_from_identity_left_diag_metrics(
self, metric_args, point):
metric = self.metric(*metric_args)
left_log_from_id = metric.left_log_from_identity(point)
log_from_id = metric.log_from_identity(point)
self.assertAllClose(left_log_from_id, log_from_id)
@geomstats.tests.np_autograd_and_tf_only
def test_exp_log_composition_at_identity(self, metric_args, tangent_vec):
metric = self.metric(*metric_args)
result = metric.left_log_from_identity(
point=metric.left_exp_from_identity(tangent_vec=tangent_vec))
self.assertAllClose(result, tangent_vec)
@geomstats.tests.np_autograd_and_tf_only
def test_log_exp_composition_at_identity(self, metric_args, point):
metric = self.metric(*metric_args)
result = metric.left_exp_from_identity(
tangent_vec=metric.left_log_from_identity(point=point))
self.assertAllClose(result, point)
from tests.conftest import Parametrizer, TestCase, np_backend
from tests.data.wald_space_data import (
SplitTestData,
TopologyTestData,
WaldSpaceTestData,
WaldTestData,
)
from tests.stratified_test_cases import PointSetTestCase, PointTestCase
IS_NOT_NP = not np_backend()
class TestWaldSpace(PointSetTestCase, metaclass=Parametrizer):
skip_all = IS_NOT_NP
testing_data = WaldSpaceTestData()
class TestWald(PointTestCase, metaclass=Parametrizer):
skip_all = IS_NOT_NP
testing_data = WaldTestData()
_Point = testing_data._Point
def test_generate_wald_belongs(self, point_args):
generated_point = self._Point.generate_wald(*point_args)
result = isinstance(generated_point, self._Point)
self.assertAllClose(result, True)
class TestSplit(TestCase, metaclass=Parametrizer):
class TestInvariantMetric(RiemannianMetricTestCase, metaclass=Parametrizer):
metric = connection = InvariantMetric
skip_test_parallel_transport_ivp_is_isometry = True
skip_test_parallel_transport_bvp_is_isometry = True
skip_test_exp_geodesic_ivp = True
skip_test_exp_shape = np_backend()
skip_test_geodesic_ivp_belongs = True
skip_test_exp_ladder_parallel_transport = np_backend()
skip_test_log_is_tangent = np_backend()
skip_test_log_shape = np_backend()
skip_test_geodesic_bvp_belongs = np_backend()
skip_test_log_then_exp = np_backend()
skip_test_geodesic_bvp_belongs = True
skip_test_exp_then_log = True
skip_test_dist_point_to_itself_is_zero = True
class InvariantMetricTestData(_RiemannianMetricTestData):
group = SpecialEuclidean(n=3, point_type="vector")
matrix_se3 = SpecialEuclidean(n=3)
matrix_so3 = SpecialOrthogonal(n=3)
vector_so3 = SpecialOrthogonal(n=3, point_type="vector")
point_1 = gs.array([-0.2, 0.9, 0.5, 5.0, 5.0, 5.0])
point_2 = gs.array([0.0, 2.0, -0.1, 30.0, 400.0, 2.0])
point_1_matrix = vector_so3.matrix_from_rotation_vector(
point_1[..., :3])
point_2_matrix = vector_so3.matrix_from_rotation_vector(
point_2[..., :3])
# Edge case for the point, angle < epsilon,
point_small = gs.array([-1e-7, 0.0, -7 * 1e-8, 6.0, 5.0, 9.0])
diag_mat_at_identity = gs.eye(group.dim)
metric_args_list = [
(group, None, "left"),
(group, None, "right"),
(group, gs.eye(group.dim), "left"),
(group, gs.eye(group.dim), "right"),
(matrix_so3, None, "right"),
(matrix_so3, None, "left"),
]
shape_list = [metric_args[0].shape for metric_args in metric_args_list]
space_list = [metric_args[0] for metric_args in metric_args_list]
n_points_list = [1, 2] * 3
n_tangent_vecs_list = [1, 2] * 3
n_points_a_list = [1, 2] * 3
n_points_b_list = [1]
alpha_list = [1] * 6
n_rungs_list = [1] * 6
scheme_list = ["pole"] * 6
def inner_product_mat_at_identity_shape_test_data(self):
group = SpecialEuclidean(n=3, point_type="vector")
sym_mat_at_identity = gs.eye(group.dim)
smoke_data = [
dict(
group=group,
metric_mat_at_identity=sym_mat_at_identity,
left_or_right="left",
)
]
return self.generate_tests(smoke_data)
def inner_product_matrix_shape_test_data(self):
group = SpecialEuclidean(n=3, point_type="vector")
sym_mat_at_identity = gs.eye(group.dim)
smoke_data = [
dict(
group=group,
metric_mat_at_identity=sym_mat_at_identity,
left_or_right="left",
base_point=None,
),
dict(
group=group,
metric_mat_at_identity=sym_mat_at_identity,
left_or_right="left",
base_point=group.identity,
),
]
return self.generate_tests(smoke_data)
def inner_product_matrix_and_its_inverse_test_data(self):
group = SpecialEuclidean(n=3, point_type="vector")
smoke_data = [
dict(group=group,
metric_mat_at_identity=None,
left_or_right="left")
]
return self.generate_tests(smoke_data)
def inner_product_test_data(self):
group = SpecialOrthogonal(n=3)
algebra = group.lie_algebra
tangent_vec_a = algebra.matrix_representation(
gs.array([1.0, 0, 2.0]))
tangent_vec_b = algebra.matrix_representation(
gs.array([1.0, 0, 0.5]))
batch_tangent_vec = algebra.matrix_representation(
gs.array([[1.0, 0, 2.0], [0, 3.0, 5.0]]))
smoke_data = [
dict(
group=group,
metric_mat_at_identity=None,
left_or_right="left",
tangent_vec_a=tangent_vec_a,
tangent_vec_b=tangent_vec_b,
base_point=None,
expected=4.0,
),
dict(
group=group,
metric_mat_at_identity=None,
left_or_right="left",
tangent_vec_a=batch_tangent_vec,
tangent_vec_b=tangent_vec_b,
base_point=None,
expected=gs.array([4.0, 5.0]),
),
dict(
group=group,
metric_mat_at_identity=None,
left_or_right="left",
tangent_vec_a=group.compose(self.point_1_matrix,
tangent_vec_a),
tangent_vec_b=group.compose(self.point_1_matrix,
tangent_vec_b),
base_point=self.point_1_matrix,
expected=4.0,
),
dict(
group=group,
metric_mat_at_identity=None,
left_or_right="left",
tangent_vec_a=group.compose(self.point_1_matrix,
batch_tangent_vec),
tangent_vec_b=group.compose(self.point_1_matrix,
tangent_vec_b),
base_point=self.point_1_matrix,
expected=gs.array([4.0, 5.0]),
),
dict(
group=group,
metric_mat_at_identity=None,
left_or_right="right",
tangent_vec_a=group.compose(tangent_vec_a,
self.point_1_matrix),
tangent_vec_b=group.compose(tangent_vec_b,
self.point_1_matrix),
base_point=self.point_1_matrix,
expected=4.0,
),
dict(
group=group,
metric_mat_at_identity=None,
left_or_right="right",
tangent_vec_a=group.compose(batch_tangent_vec,
self.point_1_matrix),
tangent_vec_b=group.compose(tangent_vec_b,
self.point_1_matrix),
base_point=self.point_1_matrix,
expected=gs.array([4.0, 5.0]),
),
]
return self.generate_tests(smoke_data)
def log_antipodals_test_data(self):
group = self.matrix_so3
smoke_data = [
dict(
group=group,
rotation_mat1=gs.eye(3),
rotation_mat2=gs.array([[1.0, 0.0, 0.0], [0.0, -1.0, 0.0],
[0.0, 0.0, -1.0]]),
expected=pytest.raises(ValueError),
)
]
return self.generate_tests(smoke_data)
def structure_constant_test_data(self):
group = self.matrix_so3
metric = InvariantMetric(group)
x, y, z = metric.normal_basis(group.lie_algebra.basis)
smoke_data = []
smoke_data += [
dict(
group=self.matrix_so3,
tangent_vec_a=x,
tangent_vec_b=y,
tangent_vec_c=z,
expected=2.0**0.5 / 2.0,
)
]
smoke_data += [
dict(
group=self.matrix_so3,
tangent_vec_a=y,
tangent_vec_b=x,
tangent_vec_c=z,
expected=-(2.0**0.5 / 2.0),
)
]
smoke_data += [
dict(
group=self.matrix_so3,
tangent_vec_a=y,
tangent_vec_b=z,
tangent_vec_c=x,
expected=2.0**0.5 / 2.0,
)
]
smoke_data += [
dict(
group=self.matrix_so3,
tangent_vec_a=z,
tangent_vec_b=y,
tangent_vec_c=x,
expected=-(2.0**0.5 / 2.0),
)
]
smoke_data += [
dict(
group=self.matrix_so3,
tangent_vec_a=z,
tangent_vec_b=x,
tangent_vec_c=y,
expected=2.0**0.5 / 2.0,
)
]
smoke_data += [
dict(
group=self.matrix_so3,
tangent_vec_a=x,
tangent_vec_b=z,
tangent_vec_c=y,
expected=-(2.0**0.5 / 2.0),
)
]
for x, y in itertools.permutations((x, y, z), 2):
smoke_data += [
dict(
group=self.matrix_so3,
tangent_vec_a=x,
tangent_vec_b=x,
tangent_vec_c=y,
expected=0.0,
)
]
return self.generate_tests(smoke_data)
def dual_adjoint_structure_constant_test_data(self):
group = self.matrix_so3
metric = InvariantMetric(group)
x, y, z = metric.normal_basis(group.lie_algebra.basis)
smoke_data = []
for x, y, z in itertools.permutations((x, y, z)):
smoke_data += [
dict(
group=group,
tangent_vec_a=x,
tangent_vec_b=y,
tangent_vec_c=z,
)
]
return self.generate_tests(smoke_data)
def connection_test_data(self):
group = self.matrix_so3
metric = InvariantMetric(group)
x, y, z = metric.normal_basis(group.lie_algebra.basis)
smoke_data = [
dict(
group=group,
tangent_vec_a=x,
tangent_vec_b=y,
expected=1.0 / 2**0.5 / 2.0 * z,
)
]
return self.generate_tests(smoke_data)
def connection_translation_map_test_data(self):
group = self.matrix_so3
metric = InvariantMetric(group)
x, y, z = metric.normal_basis(group.lie_algebra.basis)
smoke_data = [
dict(
group=group,
tangent_vec_a=x,
tangent_vec_b=y,
point=group.random_point(),
expected=1.0 / 2**0.5 / 2.0 * z,
)
]
return self.generate_tests(smoke_data)
def sectional_curvature_test_data(self):
group = self.matrix_so3
metric = InvariantMetric(group)
x, y, z = metric.normal_basis(group.lie_algebra.basis)
smoke_data = [
dict(group=group,
tangent_vec_a=x,
tangent_vec_b=y,
expected=1.0 / 8),
dict(group=group,
tangent_vec_a=y,
tangent_vec_b=y,
expected=0.0),
dict(
group=group,
tangent_vec_a=gs.stack([x, y]),
tangent_vec_b=gs.stack([z] * 2),
expected=gs.array([1.0 / 8, 1.0 / 8]),
),
]
return self.generate_tests(smoke_data)
def sectional_curvature_translation_point_test_data(self):
return self.connection_translation_map_test_data()
def curvature_test_data(self):
group = self.matrix_so3
metric = InvariantMetric(group)
x, y, z = metric.normal_basis(group.lie_algebra.basis)
smoke_data = [
dict(
group=group,
tangent_vec_a=x,
tangent_vec_b=y,
tangent_vec_c=x,
expected=1.0 / 8 * y,
),
dict(
group=group,
tangent_vec_a=gs.stack([x, x]),
tangent_vec_b=gs.stack([y] * 2),
tangent_vec_c=gs.stack([x, x]),
expected=gs.array([1.0 / 8 * y] * 2),
),
dict(
group=group,
tangent_vec_a=y,
tangent_vec_b=y,
tangent_vec_c=z,
expected=gs.zeros_like(z),
),
]
return self.generate_tests(smoke_data)
def curvature_translation_point_test_data(self):
group = self.matrix_so3
metric = InvariantMetric(group)
x, y, _ = metric.normal_basis(group.lie_algebra.basis)
smoke_data = [
dict(
group=group,
tangent_vec_a=x,
tangent_vec_b=y,
tangent_vec_c=x,
point=group.random_point(),
expected=1.0 / 8 * y,
)
]
return self.generate_tests(smoke_data)
def curvature_derivative_at_identity_test_data(self):
group = self.matrix_so3
metric = InvariantMetric(group)
basis = metric.normal_basis(group.lie_algebra.basis)
smoke_data = []
for x in basis:
for i, y in enumerate(basis):
for z in basis[i:]:
for t in basis:
smoke_data.append(
dict(
group=group,
tangent_vec_a=x,
tangent_vec_b=y,
tangent_vec_c=z,
tangent_vec_d=t,
expected=gs.zeros_like(x),
))
return self.generate_tests(smoke_data)
def curvature_derivative_tangent_translation_map_test_data(self):
group = self.matrix_so3
metric = InvariantMetric(group=group)
x, y, z = metric.normal_basis(group.lie_algebra.basis)
smoke_data = [
dict(
group=group,
tangent_vec_a=x,
tangent_vec_b=y,
tangent_vec_c=z,
tangent_vec_d=x,
base_point=group.random_point(),
expected=gs.zeros_like(x),
)
]
return self.generate_tests(smoke_data)
def integrated_exp_at_id_test_data(self):
smoke_data = [dict(group=self.matrix_so3)]
return self.generate_tests(smoke_data)
def integrated_se3_exp_at_id_test_data(self):
smoke_data = [dict(group=self.matrix_se3)]
return self.generate_tests(smoke_data)
def integrated_exp_and_log_at_id_test_data(self):
smoke_data = [dict(group=self.matrix_so3)]
return self.generate_tests(smoke_data)
def integrated_parallel_transport_test_data(self):
smoke_data = [dict(group=self.matrix_se3, n=3, n_samples=20)]
return self.generate_tests(smoke_data)
def exp_shape_test_data(self):
return self._exp_shape_test_data(self.metric_args_list,
self.space_list, self.shape_list)
def log_shape_test_data(self):
return self._log_shape_test_data(self.metric_args_list,
self.space_list)
def squared_dist_is_symmetric_test_data(self):
return self._squared_dist_is_symmetric_test_data(
self.metric_args_list,
self.space_list,
self.n_points_a_list,
self.n_points_b_list,
atol=gs.atol * 1000,
)
def exp_belongs_test_data(self):
return self._exp_belongs_test_data(
self.metric_args_list,
self.space_list,
self.shape_list,
self.n_tangent_vecs_list,
belongs_atol=1e-2,
)
def log_is_tangent_test_data(self):
return self._log_is_tangent_test_data(
self.metric_args_list,
self.space_list,
self.n_points_list,
is_tangent_atol=1e-2,
)
def geodesic_ivp_belongs_test_data(self):
return self._geodesic_ivp_belongs_test_data(
self.metric_args_list,
self.space_list,
self.shape_list,
self.n_points_list,
belongs_atol=gs.atol * 100000,
)
def geodesic_bvp_belongs_test_data(self):
return self._geodesic_bvp_belongs_test_data(
self.metric_args_list,
self.space_list,
self.n_points_list,
belongs_atol=gs.atol * 100000,
)
def log_then_exp_test_data(self):
return self._log_then_exp_test_data(
self.metric_args_list,
self.space_list,
self.n_points_list,
rtol=gs.rtol * 1000,
atol=1e-1,
)
def exp_then_log_test_data(self):
return self._exp_then_log_test_data(
self.metric_args_list,
self.space_list,
self.shape_list,
self.n_tangent_vecs_list,
amplitude=1000,
rtol=gs.rtol * 1000,
atol=1e-1,
)
def exp_ladder_parallel_transport_test_data(self):
return self._exp_ladder_parallel_transport_test_data(
self.metric_args_list,
self.space_list,
self.shape_list,
self.n_tangent_vecs_list,
self.n_rungs_list,
self.alpha_list,
self.scheme_list,
)
def exp_geodesic_ivp_test_data(self):
return self._exp_geodesic_ivp_test_data(
self.metric_args_list,
self.space_list,
self.shape_list,
self.n_tangent_vecs_list,
self.n_points_list,
rtol=gs.rtol * 100000,
atol=gs.atol * 100000,
)
def parallel_transport_ivp_is_isometry_test_data(self):
return self._parallel_transport_ivp_is_isometry_test_data(
self.metric_args_list,
self.space_list,
self.shape_list,
self.n_tangent_vecs_list,
is_tangent_atol=gs.atol * 1000,
atol=gs.atol * 1000,
)
def parallel_transport_bvp_is_isometry_test_data(self):
return self._parallel_transport_bvp_is_isometry_test_data(
self.metric_args_list,
self.space_list,
self.shape_list,
self.n_tangent_vecs_list,
is_tangent_atol=gs.atol * 1000,
atol=gs.atol * 1000,
)
def dist_is_symmetric_test_data(self):
return self._dist_is_symmetric_test_data(
self.metric_args_list,
self.space_list,
self.n_points_a_list,
self.n_points_b_list,
)
def dist_is_positive_test_data(self):
return self._dist_is_positive_test_data(
self.metric_args_list,
self.space_list,
self.n_points_a_list,
self.n_points_b_list,
)
def squared_dist_is_positive_test_data(self):
return self._squared_dist_is_positive_test_data(
self.metric_args_list,
self.space_list,
self.n_points_a_list,
self.n_points_b_list,
)
def dist_is_norm_of_log_test_data(self):
return self._dist_is_norm_of_log_test_data(
self.metric_args_list,
self.space_list,
self.n_points_a_list,
self.n_points_b_list,
)
def dist_point_to_itself_is_zero_test_data(self):
return self._dist_point_to_itself_is_zero_test_data(
self.metric_args_list, self.space_list, self.n_points_list)
def inner_product_is_symmetric_test_data(self):
return self._inner_product_is_symmetric_test_data(
self.metric_args_list,
self.space_list,
self.shape_list,
self.n_tangent_vecs_list,
)
def exp_log_composition_at_identity_test_data(self):
smoke_data = []
for metric_args in self.metric_args_list[:4]:
for tangent_vec in [self.point_1, self.point_small]:
smoke_data += [
dict(metric_args=metric_args, tangent_vec=tangent_vec)
]
return self.generate_tests(smoke_data)
def log_exp_composition_at_identity_test_data(self):
smoke_data = []
for metric_args in self.metric_args_list[:4]:
for point in [self.point_1, self.point_small]:
smoke_data += [dict(metric_args=metric_args, point=point)]
return self.generate_tests(smoke_data)
def left_exp_and_exp_from_identity_left_diag_metrics_test_data(self):
smoke_data = [
dict(metric_args=self.metric_args_list[0], point=self.point_1)
]
return self.generate_tests(smoke_data)
def left_log_and_log_from_identity_left_diag_metrics_test_data(self):
smoke_data = [
dict(metric_args=self.metric_args_list[0], point=self.point_1)
]
return self.generate_tests(smoke_data)
testing_data = InvariantMetricTestData()
def test_inner_product_mat_at_identity_shape(self, group,
metric_mat_at_identity,
left_or_right):
metric = self.metric(group, metric_mat_at_identity, left_or_right)
dim = metric.group.dim
result = metric.metric_mat_at_identity
self.assertAllClose(gs.shape(result), (dim, dim))
def test_inner_product_matrix_shape(self, group, metric_mat_at_identity,
left_or_right, base_point):
metric = self.metric(group, metric_mat_at_identity, left_or_right)
base_point = None
dim = metric.group.dim
result = metric.metric_matrix(base_point=base_point)
self.assertAllClose(gs.shape(result), (dim, dim))
base_point = group.identity
dim = metric.group.dim
result = metric.metric_matrix(base_point=base_point)
self.assertAllClose(gs.shape(result), (dim, dim))
def test_inner_product_matrix_and_its_inverse(self, group,
metric_mat_at_identity,
left_or_right):
metric = self.metric(group, metric_mat_at_identity, left_or_right)
inner_prod_mat = metric.metric_mat_at_identity
inv_inner_prod_mat = gs.linalg.inv(inner_prod_mat)
result = gs.matmul(inv_inner_prod_mat, inner_prod_mat)
expected = gs.eye(group.dim)
self.assertAllClose(result, expected)
@geomstats.tests.np_autograd_and_torch_only
def test_inner_product(
self,
group,
metric_mat_at_identity,
left_or_right,
tangent_vec_a,
tangent_vec_b,
base_point,
expected,
):
metric = self.metric(group, metric_mat_at_identity, left_or_right)
result = metric.inner_product(tangent_vec_a, tangent_vec_b, base_point)
self.assertAllClose(result, expected)
def test_structure_constant(self, group, tangent_vec_a, tangent_vec_b,
tangent_vec_c, expected):
metric = InvariantMetric(group=group)
result = metric.structure_constant(tangent_vec_a, tangent_vec_b,
tangent_vec_c)
self.assertAllClose(result, expected)
def test_dual_adjoint_structure_constant(self, group, tangent_vec_a,
tangent_vec_b, tangent_vec_c):
metric = InvariantMetric(group=group)
result = metric.inner_product_at_identity(
metric.dual_adjoint(tangent_vec_a, tangent_vec_b), tangent_vec_c)
expected = metric.structure_constant(tangent_vec_a, tangent_vec_c,
tangent_vec_b)
self.assertAllClose(result, expected)
def test_connection(self, group, tangent_vec_a, tangent_vec_b, expected):
metric = InvariantMetric(group)
self.assertAllClose(metric.connection(tangent_vec_a, tangent_vec_b),
expected)
def test_connection_translation_map(self, group, tangent_vec_a,
tangent_vec_b, point, expected):
metric = InvariantMetric(group)
translation_map = group.tangent_translation_map(point)
tan_a = translation_map(tangent_vec_a)
tan_b = translation_map(tangent_vec_b)
result = metric.connection(tan_a, tan_b, point)
expected = translation_map(expected)
self.assertAllClose(result, expected, rtol=1e-3, atol=1e-3)
def test_sectional_curvature(self, group, tangent_vec_a, tangent_vec_b,
expected):
metric = InvariantMetric(group)
result = metric.sectional_curvature(tangent_vec_a, tangent_vec_b)
self.assertAllClose(result, expected)
def test_sectional_curvature_translation_point(self, group, tangent_vec_a,
tangent_vec_b, point,
expected):
metric = InvariantMetric(group)
translation_map = group.tangent_translation_map(point)
tan_a = translation_map(tangent_vec_a)
tan_b = translation_map(tangent_vec_b)
result = metric.connection(tan_a, tan_b, point)
expected = translation_map(expected)
self.assertAllClose(result, expected)
def test_curvature(self, group, tangent_vec_a, tangent_vec_b,
tangent_vec_c, expected):
metric = InvariantMetric(group)
result = metric.curvature(tangent_vec_a,
tangent_vec_b,
tangent_vec_c,
base_point=None)
self.assertAllClose(result, expected)
def test_curvature_translation_point(self, group, tangent_vec_a,
tangent_vec_b, tangent_vec_c, point,
expected):
metric = InvariantMetric(group)
translation_map = group.tangent_translation_map(point)
tan_a = translation_map(tangent_vec_a)
tan_b = translation_map(tangent_vec_b)
tan_c = translation_map(tangent_vec_c)
result = metric.curvature(tan_a, tan_b, tan_c, point)
expected = translation_map(expected)
self.assertAllClose(result, expected)
def test_curvature_derivative_at_identity(
self,
group,
tangent_vec_a,
tangent_vec_b,
tangent_vec_c,
tangent_vec_d,
expected,
):
metric = self.metric(group)
result = metric.curvature_derivative(tangent_vec_a, tangent_vec_b,
tangent_vec_c, tangent_vec_d)
self.assertAllClose(result, expected)
def test_curvature_derivative_tangent_translation_map(
self,
group,
tangent_vec_a,
tangent_vec_b,
tangent_vec_c,
tangent_vec_d,
base_point,
expected,
):
metric = InvariantMetric(group=group)
translation_map = group.tangent_translation_map(base_point)
tan_a = translation_map(tangent_vec_a)
tan_b = translation_map(tangent_vec_b)
tan_c = translation_map(tangent_vec_c)
tan_d = translation_map(tangent_vec_d)
result = metric.curvature_derivative(tan_a, tan_b, tan_c, tan_d,
base_point)
self.assertAllClose(result, expected)
def test_integrated_exp_at_id(
self,
group,
):
metric = InvariantMetric(group=group)
basis = metric.normal_basis(group.lie_algebra.basis)
vector = gs.random.rand(2, len(basis))
tangent_vec = gs.einsum("...j,jkl->...kl", vector, basis)
identity = group.identity
result = metric.exp(tangent_vec, identity, n_steps=100, step="rk4")
expected = group.exp(tangent_vec, identity)
self.assertAllClose(expected, result, atol=1e-4)
result = metric.exp(tangent_vec, identity, n_steps=100, step="rk2")
self.assertAllClose(expected, result, atol=1e-4)
def test_integrated_se3_exp_at_id(self, group):
lie_algebra = group.lie_algebra
metric = InvariantMetric(group=group)
canonical_metric = group.left_canonical_metric
basis = metric.normal_basis(lie_algebra.basis)
vector = gs.random.rand(len(basis))
tangent_vec = gs.einsum("...j,jkl->...kl", vector, basis)
identity = group.identity
result = metric.exp(tangent_vec, identity, n_steps=100, step="rk4")
expected = canonical_metric.exp(tangent_vec, identity)
self.assertAllClose(expected, result, atol=1e-4)
result = metric.exp(tangent_vec, identity, n_steps=100, step="rk2")
self.assertAllClose(expected, result, atol=1e-4)
@geomstats.tests.autograd_tf_and_torch_only
def test_integrated_exp_and_log_at_id(self, group):
metric = InvariantMetric(group=group)
basis = group.lie_algebra.basis
vector = gs.random.rand(2, len(basis))
tangent_vec = gs.einsum("...j,jkl->...kl", vector, basis)
identity = group.identity
exp = metric.exp(tangent_vec, identity, n_steps=100, step="rk4")
result = metric.log(exp,
identity,
n_steps=15,
step="rk4",
verbose=False)
self.assertAllClose(tangent_vec, result, atol=1e-5)
def test_integrated_parallel_transport(self, group, n, n_samples):
metric = InvariantMetric(group=group)
point = group.identity
tan_b = Matrices(n + 1, n + 1).random_point(n_samples)
tan_b = group.to_tangent(tan_b)
# use a vector orthonormal to tan_b
tan_a = Matrices(n + 1, n + 1).random_point(n_samples)
tan_a = group.to_tangent(tan_a)
coef = metric.inner_product(tan_a, tan_b) / metric.squared_norm(tan_b)
tan_a -= gs.einsum("...,...ij->...ij", coef, tan_b)
tan_b = gs.einsum("...ij,...->...ij", tan_b,
1.0 / metric.norm(tan_b, base_point=point))
tan_a = gs.einsum("...ij,...->...ij", tan_a,
1.0 / metric.norm(tan_a, base_point=point))
expected = group.left_canonical_metric.parallel_transport(
tan_a, point, tan_b)
result, end_point_result = metric.parallel_transport(
tan_a, point, tan_b, n_steps=20, step="rk4", return_endpoint=True)
expected_end_point = metric.exp(tan_b, point, n_steps=20)
self.assertAllClose(end_point_result,
expected_end_point,
atol=gs.atol * 1000)
self.assertAllClose(expected, result, atol=gs.atol * 1000)
def test_log_antipodals(self, group, rotation_mat1, rotation_mat2,
expected):
with expected:
group.bi_invariant_metric.log(rotation_mat1, rotation_mat2)
@geomstats.tests.np_autograd_and_tf_only
def test_left_exp_and_exp_from_identity_left_diag_metrics(
self, metric_args, point):
metric = self.metric(*metric_args)
left_exp_from_id = metric.left_exp_from_identity(point)
exp_from_id = metric.exp_from_identity(point)
self.assertAllClose(left_exp_from_id, exp_from_id)
@geomstats.tests.np_autograd_and_tf_only
def test_left_log_and_log_from_identity_left_diag_metrics(
self, metric_args, point):
metric = self.metric(*metric_args)
left_log_from_id = metric.left_log_from_identity(point)
log_from_id = metric.log_from_identity(point)
self.assertAllClose(left_log_from_id, log_from_id)
@geomstats.tests.np_autograd_and_tf_only
def test_exp_log_composition_at_identity(self, metric_args, tangent_vec):
metric = self.metric(*metric_args)
result = metric.left_log_from_identity(
point=metric.left_exp_from_identity(tangent_vec=tangent_vec))
self.assertAllClose(result, tangent_vec)
@geomstats.tests.np_autograd_and_tf_only
def test_log_exp_composition_at_identity(self, metric_args, point):
metric = self.metric(*metric_args)
result = metric.left_exp_from_identity(
tangent_vec=metric.left_log_from_identity(point=point))
self.assertAllClose(result, point)
class TestSpecialEuclideanMatrixCanonicalRightMetric(
RiemannianMetricTestCase,
metaclass=Parametrizer,
):
metric = connection = InvariantMetric
skip_test_exp_geodesic_ivp = True
skip_test_exp_shape = np_backend()
skip_test_log_shape = np_backend()
skip_test_parallel_transport_ivp_is_isometry = True
skip_test_parallel_transport_bvp_is_isometry = True
skip_test_squared_dist_is_symmetric = np_backend()
skip_test_exp_then_log = True
skip_test_log_then_exp = True
skip_test_log_is_tangent = np_backend()
skip_test_geodesic_bvp_belongs = np_backend()
skip_test_exp_ladder_parallel_transport = np_backend()
skip_test_geodesic_ivp_belongs = True
skip_test_exp_belongs = np_backend()
skip_test_squared_dist_is_symmetric = True
skip_test_dist_is_norm_of_log = True
skip_test_dist_is_positive = np_backend()
skip_test_dist_is_symmetric = True
skip_test_dist_point_to_itself_is_zero = True
skip_test_squared_dist_is_positive = np_backend()
class SpecialEuclideanMatrixCanonicalRightMetricTestData(_RiemannianMetricTestData):
n_list = [2]
metric_args_list = [
(SpecialEuclidean(n), gs.eye(SpecialEuclidean(n).dim), "right")
for n in n_list
]
shape_list = [(n + 1, n + 1) for n in n_list]
space_list = [SpecialEuclidean(n) for n in n_list]
n_points_list = random.sample(range(1, 3), 1)
n_tangent_vecs_list = random.sample(range(1, 3), 1)
n_points_a_list = random.sample(range(1, 3), 1)
n_points_b_list = [1]
alpha_list = [1] * 1
n_rungs_list = [1] * 1
scheme_list = ["pole"] * 1
def exp_shape_test_data(self):
return self._exp_shape_test_data(
self.metric_args_list, self.space_list, self.shape_list
)
def log_shape_test_data(self):
return self._log_shape_test_data(
self.metric_args_list,
self.space_list,
)
def squared_dist_is_symmetric_test_data(self):
return self._squared_dist_is_symmetric_test_data(
self.metric_args_list,
self.space_list,
self.n_points_a_list,
self.n_points_b_list,
atol=gs.atol * 1000,
)
def exp_belongs_test_data(self):
return self._exp_belongs_test_data(
self.metric_args_list,
self.space_list,
self.shape_list,
self.n_tangent_vecs_list,
belongs_atol=1e-3,
)
def log_is_tangent_test_data(self):
return self._log_is_tangent_test_data(
self.metric_args_list,
self.space_list,
self.n_points_list,
is_tangent_atol=gs.atol * 1000,
)
def geodesic_ivp_belongs_test_data(self):
return self._geodesic_ivp_belongs_test_data(
self.metric_args_list,
self.space_list,
self.shape_list,
self.n_points_list,
belongs_atol=1e-3,
)
def geodesic_bvp_belongs_test_data(self):
return self._geodesic_bvp_belongs_test_data(
self.metric_args_list,
self.space_list,
self.n_points_list,
belongs_atol=1e-3,
)
def log_then_exp_test_data(self):
return self._log_then_exp_test_data(
self.metric_args_list,
self.space_list,
self.n_points_list,
rtol=gs.rtol * 100000,
atol=gs.atol * 100000,
)
def exp_then_log_test_data(self):
return self._exp_then_log_test_data(
self.metric_args_list,
self.space_list,
self.shape_list,
self.n_tangent_vecs_list,
amplitude=100.0,
rtol=gs.rtol * 10000,
atol=gs.atol * 100000,
)
def exp_ladder_parallel_transport_test_data(self):
return self._exp_ladder_parallel_transport_test_data(
self.metric_args_list,
self.space_list,
self.shape_list,
self.n_tangent_vecs_list,
self.n_rungs_list,
self.alpha_list,
self.scheme_list,
)
def exp_geodesic_ivp_test_data(self):
return self._exp_geodesic_ivp_test_data(
self.metric_args_list,
self.space_list,
self.shape_list,
self.n_tangent_vecs_list,
self.n_points_list,
rtol=gs.rtol * 100,
atol=gs.atol * 100,
)
def parallel_transport_ivp_is_isometry_test_data(self):
return self._parallel_transport_ivp_is_isometry_test_data(
self.metric_args_list,
self.space_list,
self.shape_list,
self.n_points_list,
is_tangent_atol=gs.atol * 1000,
atol=gs.atol * 1000,
)
def parallel_transport_bvp_is_isometry_test_data(self):
return self._parallel_transport_bvp_is_isometry_test_data(
self.metric_args_list,
self.space_list,
self.shape_list,
self.n_points_list,
is_tangent_atol=gs.atol * 1000,
atol=gs.atol * 1000,
)
def dist_is_symmetric_test_data(self):
return self._dist_is_symmetric_test_data(
self.metric_args_list,
self.space_list,
self.n_points_a_list,
self.n_points_b_list,
)
def dist_is_positive_test_data(self):
return self._dist_is_positive_test_data(
self.metric_args_list,
self.space_list,
self.n_points_a_list,
self.n_points_b_list,
)
def squared_dist_is_positive_test_data(self):
return self._squared_dist_is_positive_test_data(
self.metric_args_list,
self.space_list,
self.n_points_a_list,
self.n_points_b_list,
)
def dist_is_norm_of_log_test_data(self):
return self._dist_is_norm_of_log_test_data(
self.metric_args_list,
self.space_list,
self.n_points_a_list,
self.n_points_b_list,
)
def dist_point_to_itself_is_zero_test_data(self):
return self._dist_point_to_itself_is_zero_test_data(
self.metric_args_list, self.space_list, self.n_points_list
)
def inner_product_is_symmetric_test_data(self):
return self._inner_product_is_symmetric_test_data(
self.metric_args_list,
self.space_list,
self.shape_list,
self.n_tangent_vecs_list,
)
def right_exp_coincides_test_data(self):
smoke_data = [
dict(
n=2,
initial_vec=gs.array([gs.pi / 2, 1.0, 1.0]),
)
]
return self.generate_tests(smoke_data)
testing_data = SpecialEuclideanMatrixCanonicalRightMetricTestData()
def test_right_exp_coincides(self, n, initial_vec):
group = SpecialEuclidean(n=n)
vector_group = SpecialEuclidean(n=n, point_type="vector")
initial_matrix_vec = group.lie_algebra.matrix_representation(initial_vec)
vector_exp = vector_group.right_canonical_metric.exp(initial_vec)
result = group.right_canonical_metric.exp(initial_matrix_vec, n_steps=25)
expected = vector_group.matrix_from_vector(vector_exp)
self.assertAllClose(result, expected, atol=1e-6)