scipy.linalg.lapack.clauum

scipy.linalg.lapack.clauum(c, lower=0, overwrite_c=0) = <flapack function clauum>

Multiply a triangular matrix by its own adjoint (LAPACK clauum).

Computes u @ u.conj().T for an upper triangular c, or l.conj().T @ l for a lower triangular one, writing the result into the same triangle.

Parameters:

cndarray

Square triangular matrix; only the triangle named by lower is read. The routine assumes a Cholesky factor and reads only the real part of the diagonal; any imaginary part is ignored rather than rejected.

lowerint, optional

If nonzero, c is lower triangular; otherwise upper. Default is 0.

overwrite_cint, optional

If nonzero, c may be overwritten in place. Default is 0.

Returns:

andarray

The product, in the same triangle of c.

infoint

0 on success; if negative, the -info-th argument had an illegal value.