stegr
- void stegr(char jobz, char range, f_int n, f_float* d, f_float* e, f_float* vl, f_float* vu, f_int il, f_int iu, f_float* abstol, f_int m, f_float* w, f_float* z, f_int ldz, f_int isuppz, f_float* work, f_int lwork, f_int* iwork, f_int liwork, f_int info)
void
stegr
(,,,,,,,,,,,,,,,,,,,) - void stegr(char jobz, char range, f_int n, f_double* d, f_double* e, f_double* vl, f_double* vu, f_int il, f_int iu, f_double* abstol, f_int m, f_double* w, f_double* z, f_int ldz, f_int isuppz, f_double* work, f_int lwork, f_int* iwork, f_int liwork, f_int info)
- void stegr(char jobz, char range, f_int n, f_float* d, f_float* e, f_float* vl, f_float* vu, f_int il, f_int iu, f_float* abstol, f_int m, f_float* w, f_cfloat* z, f_int ldz, f_int isuppz, f_float* work, f_int lwork, f_int* iwork, f_int liwork, f_int info)
- void stegr(char jobz, char range, f_int n, f_double* d, f_double* e, f_double* vl, f_double* vu, f_int il, f_int iu, f_double* abstol, f_int m, f_double* w, f_cdouble* z, f_int ldz, f_int isuppz, f_double* work, f_int lwork, f_int* iwork, f_int liwork, f_int info)
Computes selected eigenvalues and, optionally, eigenvectors of a symmetric tridiagonal matrix. The eigenvalues are computed by the dqds algorithm, while eigenvectors are computed from various "good" LDL^T representations (also known as Relatively Robust Representations.)