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ippStsNotPosDefErr
Cholesky-style solvers and covariance-oriented algorithms require a symmetric or Hermitian positive-definite matrix. If the matrix is indefinite, semidefinite or not symmetric within tolerance, the factorization contract is broken.
This is different from a generic singularity report. A matrix can be nonsingular but still fail the positive-definite requirement.
Check these details
- Symmetry of the stored matrix and the selected upper/lower triangle.
- Negative or zero pivots during Cholesky factorization.
- Whether regularization is required before the solve.
Intel IPP Error Reporting · LAPACK positive-definite solvers
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