Function dtgexc_
extern(C) void dtgexc_
(
int* wantq,
int* wantz,
int* n,
double* a,
int* lda,
double* b,
int* ldb,
double* q,
int* ldq,
double* z,
int* ldz,
int* ifst,
int* ilst,
double* work,
int* lwork,
int* info
);