def _cholesky_kronecker(kronecker_operator):
# Cholesky decomposition of a Kronecker product is the Kronecker product
# of cholesky decompositions.
return linear_operator_kronecker.LinearOperatorKronecker(
operators=[
operator.cholesky() for operator in kronecker_operator.operators],
is_non_singular=True,
is_self_adjoint=False,
is_square=True)
def _inverse_kronecker(kronecker_operator):
# Inverse decomposition of a Kronecker product is the Kronecker product
# of inverse decompositions.
return linear_operator_kronecker.LinearOperatorKronecker(
operators=[
operator.inverse() for operator in kronecker_operator.operators],
is_non_singular=kronecker_operator.is_non_singular,
is_self_adjoint=kronecker_operator.is_self_adjoint,
is_positive_definite=kronecker_operator.is_positive_definite,
is_square=True)
def _adjoint_kronecker(kronecker_operator):
# Adjoint of a Kronecker product is the Kronecker product
# of adjoints.
return linear_operator_kronecker.LinearOperatorKronecker(
operators=[
operator.adjoint() for operator in kronecker_operator.operators],
is_non_singular=kronecker_operator.is_non_singular,
is_self_adjoint=kronecker_operator.is_self_adjoint,
is_positive_definite=kronecker_operator.is_positive_definite,
is_square=True)
