scipy.linalg.lapack.dsytrs

scipy.linalg.lapack.dsytrs(a, ipiv, b, lower=0, overwrite_b=0) = <flapack function dsytrs>

Solve a symmetric indefinite system using the factorization from sytrf (LAPACK dsytrs).

Parameters:

andarray

The factorization, of shape (lda, n). A taller-than-wide buffer is accepted as long as lda >= n.

ipivndarray

Pivot indices from the Bunch-Kaufman factorization, 1-based exactly as sytrf/hetrf returned them – this group shifts at neither end.

bndarray

Right-hand side(s) of shape (n, nrhs).

lowerint, optional

If nonzero, the lower triangle of a is referenced; otherwise the upper. Default is 0.

overwrite_bint, optional

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

Returns:

xndarray

Solution of the system.

infoint

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