##### pptri

###### Prototype

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

    pptri( MatrixAP& ap );

###### Description

`pptri` (short for $FRIENDLY_NAME) provides a C++ interface to LAPACK routines SPPTRI, DPPTRI, CPPTRI, and ZPPTRI. `pptri` computes the inverse of a complex Hermitian positive definite matrix A using the Cholesky factorization A = U**H*U or A = LL*H computed by ZPPTRF.

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

Table 1.279. Dispatching of pptri

Value type of MatrixAP | LAPACK routine
--- | ---
`float` | SPPTRI
`double` | DPPTRI
`complex<float>` | CPPTRI
`complex<double>` | ZPPTRI

###### Definition

Defined in header `boost/numeric/bindings/lapack/computational/pptri.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/pptri.hpp>
    using namespace boost::numeric::bindings;

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

this will output

    [5] 0 1 2 3 4 5

###### Notes

###### See Also

- Originating Fortran source files spptri.f, dpptri.f, cpptri.f, and zpptri.f at Netlib.