tf.matrix_triangular_solve()

tf.matrix_triangular_solve(matrix, rhs, lower=None, adjoint=None, name=None)

Solves systems of linear equations with upper or lower triangular matrices by

backsubstitution.

matrix is a tensor of shape [..., M, M] whose inner-most 2 dimensions form square matrices. If lower is True then the strictly upper triangular part of each inner-most matrix is assumed to be zero and not accessed. If lower is False then the strictly lower triangular part of each inner-most matrix is assumed to be zero and not accessed. rhs is a tensor of shape [..., M, K].

The output is a tensor of shape [..., M, K]. If adjoint is True then the innermost matrices in outputsatisfy matrix equationsmatrix[..., :, :] * output[..., :, :] = rhs[..., :, :]. IfadjointisFalsethen the strictly then the innermost matrices inoutputsatisfy matrix equationsadjoint(matrix[..., i, k]) * output[..., k, j] = rhs[..., i, j]`.

Args:

• matrix: A Tensor. Must be one of the following types: float64, float32. Shape is [..., M, M].
• rhs: A Tensor. Must have the same type as matrix. Shape is [..., M, K].
• lower: An optional bool. Defaults to True. Boolean indicating whether the innermost matrices in matrix are lower or upper triangular.
• adjoint: An optional bool. Defaults to False. Boolean indicating whether to solve with matrix or its (block-wise) adjoint.
• name: A name for the operation (optional).

Returns:

A Tensor. Has the same type as matrix. Shape is [..., M, K].