##### tbcon

###### Prototype

There is one prototype of `tbcon` available, please see below.

    tbcon( const char norm, const int_t kd, const MatrixAB& ab,
            Scalar > );

###### Description

`tbcon` (short for $FRIENDLY_NAME) provides a C++ interface to LAPACK routines STBCON, DTBCON, CTBCON, and ZTBCON. `tbcon` estimates the reciprocal of the condition number of a triangular band matrix A, in either the 1-norm or the infinity-norm.

The norm of A is computed and an estimate is obtained for norm(inv(A)), then the reciprocal of the condition number is computed as RCOND = 1 / ( norm(A) * norm(inv(A)) ).

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

Table 1.296. Dispatching of tbcon

Value type of MatrixAB | LAPACK routine
--- | ---
`float` | STBCON
`double` | DTBCON
`complex<float>` | CTBCON
`complex<double>` | ZTBCON

###### Definition

Defined in header `boost/numeric/bindings/lapack/computational/tbcon.hpp`.

###### Parameters or Requirements on Types

Parameters

MatrixA

  The definition of term 1

MatrixB

  The definition of term 2

MatrixC

  The definition of term 3.

  Definitions may contain paragraphs.

###### Complexity

###### Example

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

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

this will output

    [5] 0 1 2 3 4 5

###### Notes

###### See Also

- Originating Fortran source files stbcon.f, dtbcon.f, ctbcon.f, and ztbcon.f at Netlib.