scipy.linalg.lapack.zpftrf

scipy.linalg.lapack.zpftrf(n, a, transr='N', uplo='U', overwrite_a=0) = <flapack function zpftrf>

Compute the Cholesky factorization of a positive definite matrix in rectangular full packed (RFP) storage (LAPACK zpftrf).

Parameters:

nint

Order of the square matrix.

andarray

The triangle named by uplo, in RFP storage, length n * (n + 1) / 2.

transrstr, optional

'N' for the normal RFP layout, 'C' for the transposed one. Default is 'N'.

uplostr, optional

'U' if a holds the upper triangle, 'L' if lower. Default is 'U'.

overwrite_aint, optional

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

Returns:

acholndarray

The Cholesky factor in RFP storage, overwriting a.

infoint

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