DSMatType#

Used to refer to one of the matrices stored internally in DS

Synopsis#

typedef enum { DS_MAT_A,
               DS_MAT_B,
               DS_MAT_C,
               DS_MAT_T,
               DS_MAT_D,
               DS_MAT_Q,
               DS_MAT_Z,
               DS_MAT_X,
               DS_MAT_Y,
               DS_MAT_U,
               DS_MAT_V,
               DS_MAT_W,
               DS_MAT_E0,
               DS_MAT_E1,
               DS_MAT_E2,
               DS_MAT_E3,
               DS_MAT_E4,
               DS_MAT_E5,
               DS_MAT_E6,
               DS_MAT_E7,
               DS_MAT_E8,
               DS_MAT_E9,
               DS_NUM_MAT } DSMatType;

Notes#

The matrices preferentially refer to

  • DS_MAT_A - first matrix of eigenproblem/singular value problem

  • DS_MAT_B - second matrix of a generalized eigenproblem

  • DS_MAT_C - third matrix of a quadratic eigenproblem (deprecated)

  • DS_MAT_T - tridiagonal matrix

  • DS_MAT_D - diagonal matrix

  • DS_MAT_Q - orthogonal matrix of (right) Schur vectors

  • DS_MAT_Z - orthogonal matrix of left Schur vectors

  • DS_MAT_X - right eigenvectors

  • DS_MAT_Y - left eigenvectors

  • DS_MAT_U - left singular vectors

  • DS_MAT_V - right singular vectors

  • DS_MAT_W - workspace matrix

  • DS_MAT_Ex - extra matrices (x=0,..,9)

All matrices can have space to hold ld x ld elements, except for DS_MAT_T that has space for 3 x ld elements (ld = leading dimension) and DS_MAT_D that has space for just ld elements.

In DSPEP problems, matrices A, B, W can have space for dld x dld, where d is the polynomial degree, and X can have ld x d*ld. Also DSNEP has exceptions. Check the manual page of each DS type for details.

See Also#

DSAllocate(), DSGetArray(), DSGetArrayReal(), DSVectors()

Level#

advanced

Location#

include/slepcds.h

Index of all DS routines Table of Contents for all manual pages Index of all manual pages