ARPACK

Eigenvalue of sparse matrices.

📄️ SSAUPD

Reverse communication interface (RCI) for the Implicitly Restarted Arnoldi Iteration.

📄️ SSEUPD

This subroutine returns the converged approximations to eigenvalues of Az = lambdaB*z.

📄️ SymLargestEigenval

This function computes the largest eigenvalue of a symmetric matrix.

📄️ SymSmallestEigenVal

This function calculates the smallest eigenvalue of a real sym dense matrix.