Prototype

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

gehrd( const int_t ilo, const int_t ihi,
        MatrixA& a, VectorTAU& tau );

Description

gehrd (short for $FRIENDLY_NAME) provides a C++ interface to LAPACK routines SGEHRD, DGEHRD, CGEHRD, and ZGEHRD. gehrd reduces a complex general matrix A to upper Hessenberg form H by an unitary similarity transformation: Q' * A * Q = H .

The selection of the LAPACK routine is done during compile-time, and is determined by the type of values contained in type MatrixA. The type of values is obtained through the value_type meta-function typename value_type<MatrixA>::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/gehrd.hpp.

Parameters or Requirements on Types

Complexity

Example

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

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

this will output

[5] 0 1 2 3 4 5

Notes

See Also