gehrd
- void gehrd(f_int n, f_int ilo, f_int ihi, f_float* a, f_int lda, f_float* tau, f_float* work, f_int lwork, f_int info)
- void gehrd(f_int n, f_int ilo, f_int ihi, f_double* a, f_int lda, f_double* tau, f_double* work, f_int lwork, f_int info)
- void gehrd(f_int n, f_int ilo, f_int ihi, f_cfloat* a, f_int lda, f_cfloat* tau, f_cfloat* work, f_int lwork, f_int info)
- void gehrd(f_int n, f_int ilo, f_int ihi, f_cdouble* a, f_int lda, f_cdouble* tau, f_cdouble* work, f_int lwork, f_int info)
Reduces a general matrix to upper Hessenberg form by an orthogonal similarity transformation.