dpotrs - solve a system of linear equations A*X = B with a symmetric positive definite matrix A using the Cholesky factorization A = U**T*U or A = L*L**T computed by DPOTRF
SUBROUTINE DPOTRS(UPLO, N, NRHS, A, LDA, B, LDB, INFO) CHARACTER*1 UPLO INTEGER N, NRHS, LDA, LDB, INFO DOUBLE PRECISION A(LDA,*), B(LDB,*) SUBROUTINE DPOTRS_64(UPLO, N, NRHS, A, LDA, B, LDB, INFO) CHARACTER*1 UPLO INTEGER*8 N, NRHS, LDA, LDB, INFO DOUBLE PRECISION A(LDA,*), B(LDB,*) F95 INTERFACE SUBROUTINE POTRS(UPLO, N, NRHS, A, LDA, B, LDB, INFO) CHARACTER(LEN=1) :: UPLO INTEGER :: N, NRHS, LDA, LDB, INFO REAL(8), DIMENSION(:,:) :: A, B SUBROUTINE POTRS_64(UPLO, N, NRHS, A, LDA, B, LDB, INFO) CHARACTER(LEN=1) :: UPLO INTEGER(8) :: N, NRHS, LDA, LDB, INFO REAL(8), DIMENSION(:,:) :: A, B C INTERFACE #include <sunperf.h> void dpotrs(char uplo, int n, int nrhs, double *a, int lda, double *b, int ldb, int *info); void dpotrs_64(char uplo, long n, long nrhs, double *a, long lda, dou- ble *b, long ldb, long *info);
Oracle Solaris Studio Performance Library dpotrs(3P) NAME dpotrs - solve a system of linear equations A*X = B with a symmetric positive definite matrix A using the Cholesky factorization A = U**T*U or A = L*L**T computed by DPOTRF SYNOPSIS SUBROUTINE DPOTRS(UPLO, N, NRHS, A, LDA, B, LDB, INFO) CHARACTER*1 UPLO INTEGER N, NRHS, LDA, LDB, INFO DOUBLE PRECISION A(LDA,*), B(LDB,*) SUBROUTINE DPOTRS_64(UPLO, N, NRHS, A, LDA, B, LDB, INFO) CHARACTER*1 UPLO INTEGER*8 N, NRHS, LDA, LDB, INFO DOUBLE PRECISION A(LDA,*), B(LDB,*) F95 INTERFACE SUBROUTINE POTRS(UPLO, N, NRHS, A, LDA, B, LDB, INFO) CHARACTER(LEN=1) :: UPLO INTEGER :: N, NRHS, LDA, LDB, INFO REAL(8), DIMENSION(:,:) :: A, B SUBROUTINE POTRS_64(UPLO, N, NRHS, A, LDA, B, LDB, INFO) CHARACTER(LEN=1) :: UPLO INTEGER(8) :: N, NRHS, LDA, LDB, INFO REAL(8), DIMENSION(:,:) :: A, B C INTERFACE #include <sunperf.h> void dpotrs(char uplo, int n, int nrhs, double *a, int lda, double *b, int ldb, int *info); void dpotrs_64(char uplo, long n, long nrhs, double *a, long lda, dou- ble *b, long ldb, long *info); PURPOSE dpotrs solves a system of linear equations A*X = B with a symmetric positive definite matrix A using the Cholesky factorization A = U**T*U or A = L*L**T computed by DPOTRF. ARGUMENTS UPLO (input) = 'U': Upper triangle of A is stored; = 'L': Lower triangle of A is stored. N (input) The order of the matrix A. N >= 0. NRHS (input) The number of right hand sides, i.e., the number of columns of the matrix B. NRHS >= 0. A (input) The triangular factor U or L from the Cholesky factorization A = U**T*U or A = L*L**T, as computed by DPOTRF. LDA (input) The leading dimension of the array A. LDA >= max(1,N). B (input/output) On entry, the right hand side matrix B. On exit, the solu- tion matrix X. LDB (input) The leading dimension of the array B. LDB >= max(1,N). INFO (output) = 0: successful exit < 0: if INFO = -i, the i-th argument had an illegal value 7 Nov 2015 dpotrs(3P)