PLASMA: PLASMA_cposv

PLASMA 2.4.6

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int PLASMA_cposv | ( | PLASMA_enum | uplo,
|  | int | N,
|  | int | NRHS,
|  | PLASMA_Complex32_t * | A,
|  | int | LDA,
|  | PLASMA_Complex32_t * | B,
|  | int | LDB
| ) |  |
  PLASMA_cposv - Computes the solution to a system of linear equations A * X = B, where A is an N-by-N symmetric positive definite (or Hermitian positive definite in the complex case) matrix and X and B are N-by-NRHS matrices. The Cholesky decomposition is used to factor A as where U is an upper triangular matrix and L is a lower triangular matrix. The factored form of A is then used to solve the system of equations A * X = B. Parameters
  [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 number of linear equations, i.e., the order of the matrix A. N >= 0.
  [in] | NRHS | The number of right hand sides, i.e., the number of columns of the matrix B. NRHS >= 0.
  [in,out] | A | On entry, the symmetric positive definite (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 = 'L', 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, if return value = 0, the factor U or L from the Cholesky factorization A = U**H*U or A = L*L**H.
  [in] | LDA | The leading dimension of the array A. LDA >= max(1,N).
  [in,out] | B | On entry, the N-by-NRHS right hand side matrix B. On exit, if return value = 0, the N-by-NRHS solution matrix X.
  [in] | LDB | The leading dimension of the array B. LDB >= max(1,N).
  Returns Return values
  PLASMA_SUCCESS | successful exit
  <0 | if -i, the i-th argument had an illegal value
  >0 | if i, the leading minor of order i of A is not positive definite, so the factorization could not be completed, and the solution has not been computed.
See Also PLASMA_cposv_Tile PLASMA_cposv_Tile_Async PLASMA_cposv PLASMA_dposv PLASMA_sposv