def __init__(self, parent, A, copy_matrix=True):
"""
Initialize ``self``.
EXAMPLES::
sage: from sage.modules.matrix_morphism import MatrixMorphism
sage: T = End(ZZ^3)
sage: M = MatrixSpace(ZZ,3)
sage: I = M.identity_matrix()
sage: A = MatrixMorphism(T, I)
sage: loads(A.dumps()) == A
True
"""
if parent is None:
raise ValueError("no parent given when creating this matrix morphism")
if isinstance(A, MatrixMorphism_abstract):
A = A.matrix()
R = A.base_ring()
if A.nrows() != parent.domain().rank():
raise ArithmeticError("number of rows of matrix (={}) must equal rank of domain (={})".format(A.nrows(), parent.domain().rank()))
if A.ncols() != parent.codomain().rank():
raise ArithmeticError("number of columns of matrix (={}) must equal rank of codomain (={})".format(A.ncols(), parent.codomain().rank()))
if A.is_mutable():
if copy_matrix:
from copy import copy
A = copy(A)
A.set_immutable()
self._matrix = A
MatrixMorphism_abstract.__init__(self, parent)
def __init__(self, parent, A, copy_matrix=True):
"""
Initialize ``self``.
EXAMPLES::
sage: from sage.modules.matrix_morphism import MatrixMorphism
sage: T = End(ZZ^3)
sage: M = MatrixSpace(ZZ,3)
sage: I = M.identity_matrix()
sage: A = MatrixMorphism(T, I)
sage: loads(A.dumps()) == A
True
"""
if parent is None:
raise ValueError("no parent given when creating this matrix morphism")
if isinstance(A, MatrixMorphism_abstract):
A = A.matrix()
if A.nrows() != parent.domain().rank():
raise ArithmeticError("number of rows of matrix (={}) must equal rank of domain (={})".format(A.nrows(), parent.domain().rank()))
if A.ncols() != parent.codomain().rank():
raise ArithmeticError("number of columns of matrix (={}) must equal rank of codomain (={})".format(A.ncols(), parent.codomain().rank()))
if A.is_mutable():
if copy_matrix:
from copy import copy
A = copy(A)
A.set_immutable()
self._matrix = A
MatrixMorphism_abstract.__init__(self, parent)