ctrsyl - solve the complex Sylvester matrix equation
SUBROUTINE CTRSYL( TRANA, TRANB, ISGN, M, N, A, LDA, B, LDB, C, LDC, * SCALE, INFO) CHARACTER * 1 TRANA, TRANB COMPLEX A(LDA,*), B(LDB,*), C(LDC,*) INTEGER ISGN, M, N, LDA, LDB, LDC, INFO REAL SCALE
SUBROUTINE CTRSYL_64( TRANA, TRANB, ISGN, M, N, A, LDA, B, LDB, C, * LDC, SCALE, INFO) CHARACTER * 1 TRANA, TRANB COMPLEX A(LDA,*), B(LDB,*), C(LDC,*) INTEGER*8 ISGN, M, N, LDA, LDB, LDC, INFO REAL SCALE
SUBROUTINE TRSYL( TRANA, TRANB, ISGN, [M], [N], A, [LDA], B, [LDB], * C, [LDC], SCALE, [INFO]) CHARACTER(LEN=1) :: TRANA, TRANB COMPLEX, DIMENSION(:,:) :: A, B, C INTEGER :: ISGN, M, N, LDA, LDB, LDC, INFO REAL :: SCALE
SUBROUTINE TRSYL_64( TRANA, TRANB, ISGN, [M], [N], A, [LDA], B, [LDB], * C, [LDC], SCALE, [INFO]) CHARACTER(LEN=1) :: TRANA, TRANB COMPLEX, DIMENSION(:,:) :: A, B, C INTEGER(8) :: ISGN, M, N, LDA, LDB, LDC, INFO REAL :: SCALE
#include <sunperf.h>
void ctrsyl(char trana, char tranb, int isgn, int m, int n, complex *a, int lda, complex *b, int ldb, complex *c, int ldc, float *scale, int *info);
void ctrsyl_64(char trana, char tranb, long isgn, long m, long n, complex *a, long lda, complex *b, long ldb, complex *c, long ldc, float *scale, long *info);
ctrsyl solves the complex Sylvester matrix equation:
op(A)*X + X*op(B) = scale*C or
op(A)*X - X*op(B) = scale*C,
where op(A)
= A or A**H, and A and B are both upper triangular. A is
M-by-M and B is N-by-N; the right hand side C and the solution X are
M-by-N; and scale is an output scale factor, set <= 1 to avoid
overflow in X.
= 'N': op(A) = A (No transpose)
= 'C': op(A) = A**H (Conjugate transpose)
= 'N': op(B) = B (No transpose)
= 'C': op(B) = B**H (Conjugate transpose)
= +1: solve op(A)*X + X*op(B) = scale*C
= -1: solve op(A)*X - X*op(B) = scale*C
max(1,M)
= 0: successful exit
< 0: if INFO = -i, the i-th argument had an illegal value
= 1: A and B have common or very close eigenvalues; perturbed values were used to solve the equation (but the matrices A and B are unchanged).