skrf.mathFunctions.is_positive_semidefinite

skrf.mathFunctions.is_positive_semidefinite(mat, tol=1e-12)[source]

Tests mat for positive semidefiniteness.

Checking whether all eigenvalues of mat are nonnegative within a certain tolerance

Parameters:

  • mat (npy.ndarray) – Matrix to test for positive semidefiniteness

  • tol (float, optional) – Absolute tolerance in determining nonnegativity due to loss of precision when computing the eigenvalues of mat. Defaults to ALMOST_ZERO

Returns:

res

Return type:

bool or array of bool

See also

is_Hermitian, is_positive_definite