scipy.linalg.lapack.spftri

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

Invert a positive definite matrix in rectangular full packed (RFP) storage from its Cholesky factorization (LAPACK spftri).

Parameters:

nint

Order of the square matrix.

andarray

Cholesky factorization in RFP storage, as returned by pftrf.

transrstr, optional

'N' for the normal RFP layout, 'T' 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:

ainvndarray

The inverse in RFP storage, overwriting a.

infoint

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