Prototype

There is one prototype of tgsna available, please see below.

tgsna( const char job, const char howmny, const VectorSELECT& select,
        const int_t n, const MatrixA& a, const MatrixB& b,
        const MatrixVL& vl, const MatrixVR& vr, VectorS& s, VectorDIF& dif,
        const int_t mm, int_t& m );

Description

tgsna (short for $FRIENDLY_NAME) provides a C++ interface to LAPACK routines STGSNA, DTGSNA, CTGSNA, and ZTGSNA. tgsna estimates reciprocal condition numbers for specified eigenvalues and/or eigenvectors of a matrix pair (A, B).

(A, B) must be in generalized Schur canonical form, that is, A and B are both upper triangular.

The selection of the LAPACK routine is done during compile-time, and is determined by the type of values contained in type VectorSELECT. The type of values is obtained through the value_type meta-function typename value_type<VectorSELECT>::type. The dispatching table below illustrates to which specific routine the code path will be generated.

Definition

Defined in header boost/numeric/bindings/lapack/computational/tgsna.hpp.

Parameters or Requirements on Types

Complexity

Example

#include <boost/numeric/bindings/lapack/computational/tgsna.hpp>
using namespace boost::numeric::bindings;

lapack::tgsna( x, y, z );

this will output

[5] 0 1 2 3 4 5

Notes

See Also