PLASMA: PLASMA_cheevd

PLASMA 2.4.6

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int PLASMA_cheevd | ( | PLASMA_enum | jobz,
|  | PLASMA_enum | uplo,
|  | int | N,
|  | PLASMA_Complex32_t * | A,
|  | int | LDA,
|  | float * | W,
|  | PLASMA_desc * | descT,
|  | PLASMA_Complex32_t * | Q,
|  | int | LDQ
| ) |  |
  PLASMA_cheevd - Computes all eigenvalues and, optionally, eigenvectors of a complex Hermitian matrix A. The matrix A is preliminary reduced to tridiagonal form using a two-stage approach: First stage: reduction to band tridiagonal form; Second stage: reduction from band to tridiagonal form. Parameters
  [in] | jobz | Intended usage: = PlasmaNoVec: computes eigenvalues only; = PlasmaVec: computes eigenvalues and eigenvectors.
  [in] | uplo | Specifies whether the matrix A is upper triangular or lower triangular: = PlasmaUpper: Upper triangle of A is stored; = PlasmaLower: Lower triangle of A is stored.
  [in] | N | The order of the matrix A. N >= 0.
  [in,out] | A | On entry, the symmetric (or Hermitian) matrix A. If uplo = PlasmaUpper, the leading N-by-N upper triangular part of A contains the upper triangular part of the matrix A, and the strictly lower triangular part of A is not referenced. If uplo = PlasmaLower, the leading N-by-N lower triangular part of A contains the lower triangular part of the matrix A, and the strictly upper triangular part of A is not referenced. On exit, the lower triangle (if uplo = PlasmaLower) or the upper triangle (if uplo = PlasmaUpper) of A, including the diagonal, is destroyed.
  [in] | LDA | The leading dimension of the array A. LDA >= max(1,N).
  [out] | W | On exit, if info = 0, the eigenvalues.
  [in,out] | descT | On entry, descriptor as return by PLASMA_Alloc_Workspace_cheevd On exit, contains auxiliary factorization data.
  [out] | Q | On exit, if jobz = PlasmaVec and info = 0, the eigenvectors.
  [in] | LDQ | The leading dimension of the array Q. LDQ >= max(1,N).
  Returns Return values
  PLASMA_SUCCESS | successful exit
  <0 | if -i, the i-th argument had an illegal value
  >0 | if INFO = i, the algorithm failed to converge; i off-diagonal elements of an intermediate tridiagonal form did not converge to zero.
See Also PLASMA_cheevd_Tile PLASMA_cheevd_Tile_Async PLASMA_cheevd PLASMA_dsyev PLASMA_ssyev