Extended Eigensolver Functionality
- Acomplex Hermitian
- Areal symmetric
- Acomplex Hermitian,BHermitian positive definite (hpd)
- Areal symmetric andBreal symmetric positive definite (spd)
- Real/Complex and Single/Double precisions: double precision is recommended to provide better accuracy of eigenpairs.
- Reverse communication interfaces (RCI) provide maximum flexibility for specific applications. RCI are independent of matrix format and inner system solvers, so you must provide your own linear system solvers (direct or iterative) and matrix-matrix multiply routines.
- Predefined driver interfaces for dense, LAPACK banded, and sparse (CSR) formats are less flexible but are optimized and easy to use:
- The Extended Eigensolver interfaces for dense matrices are likely to be slower than the comparable LAPACK routines because the FEAST algorithm has a higher computational cost.
- The Extended Eigensolver interfaces for banded matrices support banded LAPACK-type storage.
- The Extended Eigensolver sparse interfaces support compressed sparse row format and use thePARDISO solver.Intel® oneAPI Math Kernel Library
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Notice revision #20110804