There are two prototypes of gees
available, please see below.
gees( const char jobvs, const char sort, external_fp select, MatrixA& a, int_t& sdim, VectorWR& wr, VectorWI& wi, MatrixVS& vs );
gees( const char jobvs, const char sort, external_fp select, MatrixA& a, int_t& sdim, VectorW& w, MatrixVS& vs );
gees (short for $FRIENDLY_NAME)
provides a C++ interface to LAPACK routines SGEES, DGEES, CGEES, and
ZGEES. gees computes
for an N-by-N complex nonsymmetric matrix A, the eigenvalues, the Schur
form T, and, optionally, the matrix of Schur vectors Z. This gives the
Schur factorization A = ZT(Z**H).
Optionally, it also orders the eigenvalues on the diagonal of the Schur form so that selected eigenvalues are at the top left. The leading columns of Z then form an orthonormal basis for the invariant subspace corresponding to the selected eigenvalues.
A complex matrix is in Schur form if it is upper triangular.
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.
Table 1.151. Dispatching of gees
|
Value type of MatrixA |
LAPACK routine |
|---|---|
|
|
SGEES |
|
|
DGEES |
|
|
CGEES |
|
|
ZGEES |
Defined in header boost/numeric/bindings/lapack/driver/gees.hpp.
Parameters
The definition of term 1
The definition of term 2
The definition of term 3.
Definitions may contain paragraphs.
#include <boost/numeric/bindings/lapack/driver/gees.hpp> using namespace boost::numeric::bindings; lapack::gees( x, y, z );
this will output
[5] 0 1 2 3 4 5