scipy.linalg.lapack.spbtrs#
- scipy.linalg.lapack.spbtrs(ab, b, lower=0, ldab=ab.shape[0], overwrite_b=0) = <flapack function spbtrs>#
Solve a positive definite band system using a Cholesky factorization already computed by
pbtrf(LAPACKspbtrs).- Parameters:
- abndarray
Banded Cholesky factor, as returned by
pbtrf.- bndarray
Right-hand side(s) of shape
(n, nrhs).- lowerint, optional
If nonzero, the lower triangle of a is referenced and the factor is lower triangular; otherwise the upper. Default is 0.
- ldabint, optional
Leading dimension of ab. It must equal
ab.shape[0]; the argument exists only because the.pyfexposed it. Default isab.shape[0].- overwrite_bint, optional
If nonzero, b may be overwritten in place. Default is 0.
- Returns:
- xndarray
Solution of the system, overwriting b.
- infoint
0 on success; if negative, the
-info-th argument had an illegal value.