There is one prototype of upgtr
            available, please see below. 
upgtr( const char uplo, const VectorAP& ap, const VectorTAU& tau, MatrixQ& q );
            upgtr (short for $FRIENDLY_NAME)
            provides a C++ interface to LAPACK routines SOPGTR, DOPGTR, CUPGTR, and
            ZUPGTR. upgtr generates
            a complex unitary matrix Q which is defined as the product of n-1 elementary
            reflectors H(i) of order n, as returned by ZHPTRD using packed storage:
          
if UPLO = 'U', Q = H(n-1) . . . H(2) H(1),
if UPLO = 'L', Q = H(1) H(2) . . . H(n-1).
            The selection of the LAPACK routine is done during compile-time, and
            is determined by the type of values contained in type VectorAP.
            The type of values is obtained through the value_type
            meta-function typename value_type<VectorAP>::type. The dispatching table below illustrates
            to which specific routine the code path will be generated.
          
Table 1.328. Dispatching of upgtr
| Value type of VectorAP | LAPACK routine | 
|---|---|
| 
                       | SOPGTR | 
| 
                       | DOPGTR | 
| 
                       | CUPGTR | 
| 
                       | ZUPGTR | 
            Defined in header boost/numeric/bindings/lapack/computational/upgtr.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/computational/upgtr.hpp> using namespace boost::numeric::bindings; lapack::upgtr( x, y, z );
this will output
[5] 0 1 2 3 4 5