cirq.is_diagonal

cirq.is_diagonal(matrix: numpy.ndarray, tolerance: cirq.linalg.tolerance.Tolerance = Tolerance(rtol=1e-05, atol=1e-08, equal_nan=False)) → bool

Determines if a matrix is a approximately diagonal.

A matrix is diagonal if i!=j implies m[i,j]==0.

Parameters:

• matrix – The matrix to check.
• tolerance – The per-matrix-entry tolerance on equality.

Returns:

Whether the matrix is diagonal within the given tolerance.