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lapack/gonum: clarify ok return from Dpstrf and Dpstf2

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This commit is contained in:
Vladimir Chalupecky
2022-02-04 08:52:23 +01:00
committed by Vladimír Chalupecký
parent ce4adcfbd5
commit b091b0b4e2
3 changed files with 12 additions and 9 deletions
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7
lapack/lapack64/lapack64.go
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@@ -145,9 +145,10 @@ func Pbtrs(t blas64.TriangularBand, b blas64.General) {
// and the underlying data between a and t is shared. P is stored on return in
// vector piv such that P[piv[k],k] = 1.
//
// Pstrf also returns the computed rank of A and whether the algorithm completed
// successfully. If ok is false, the matrix A is either rank deficient or is not
// positive semidefinite.
// Pstrf returns the computed rank of A and whether the factorization can be
// used to solve a system. Pstrf does not attempt to check that A is positive
// semi-definite, so if ok is false, the matrix A is either rank deficient or is
// not positive semidefinite.
//
// The length of piv must be n and the length of work must be at least 2*n,
// otherwise Pstrf will panic.