Driver Routines for Standard Eigenvalue Problems with RRR algorithm

• CALL LA_SYEVR / LA_HEEVR ( A, W, JOBZ=jobz, UPLO=uplo, VL=vl, VU=vu, &
                                       IL=il, IU=iu, M=m, ISUPPZ=isuppz, ABSTOL=abstol, INFO=info )
  Computes selected eigenvalues and, optionally, eigenvectors of a real symmetric/complex Hermitian matrix A. Eigenvalues and eigenvectors can be selected by specifying either a range of values or a range of indices for the desired eigenvalues. Uses a Relatively Robust Representation (RRR) algorithm.
• CALL LA_STEVR ( D, E, W, Z=z, VL=vl, VU=vu, IL=il, IU=iu, M=m, &
                                       ISUPPZ=isuppz, ABSTOL=abstol, INFO=info )
  Computes selected eigenvalues and, optionally, the corresponding eigenvectors of a real symmetric tridiagonal matrix A. Eigenvalues and eigenvectors can be selected by specifying either a range of values or a range of indices for the desired eigenvalues. Uses a Relatively Robust Representation (RRR) algorithm.

  
  

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