`scipy.linalg._flapack:csytrs`

Signature

def csytrs(a, ipiv, b, lower = 0, overwrite_b = 0)

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

a : ndarray: The factorization, of shape (lda, n). A taller-than-wide buffer is accepted as long as lda >= n.
ipiv : ndarray: Pivot indices from the Bunch-Kaufman factorization, 1-based exactly as sytrf/hetrf returned them -- this group shifts at neither end.
b : ndarray: Right-hand side(s) of shape (n, nrhs).
lower : int, optional: If nonzero, the lower triangle of a is referenced; otherwise the upper. Default is 0.
overwrite_b : int, optional: If nonzero, b may be overwritten in place. Default is 0.

x : ndarray: Solution of the system.
info : int: 0 on success; if negative, the -info-th argument had an illegal value.