PPL: Parma_Polyhedra_Library::BHRZ03_Certificate Class Reference

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# Parma_Polyhedra_Library::BHRZ03_Certificate Class Reference

The convergence certificate for the BHRZ03 widening operator. More...

List of all members.

## Public Member Functions
| BHRZ03_Certificate ()
| Default constructor.
| BHRZ03_Certificate (const Polyhedron &ph)
| Constructor: computes the certificate for `ph`.
| BHRZ03_Certificate (const BHRZ03_Certificate &y)
| Copy constructor.
| ~BHRZ03_Certificate ()
| Destructor.
int | compare (const BHRZ03_Certificate &y) const
| The comparison function for certificates.
int | compare (const Polyhedron &ph) const
| Compares `*this` with the certificate for polyhedron `ph`.

## Detailed Description

The convergence certificate for the BHRZ03 widening operator.

Convergence certificates are used to instantiate the BHZ03 framework so as to define widening operators for the finite powerset domain.

Note:
  Each convergence certificate has to be used together with a compatible widening operator. In particular, BHRZ03_Certificate can certify the convergence of both the BHRZ03 and the H79 widenings.

## Member Function Documentation

int Parma_Polyhedra_Library::BHRZ03_Certificate::compare | ( | const BHRZ03_Certificate & | y | ) | const

| The comparison function for certificates. Returns: , or depending on whether `*this` is smaller than, equal to, or greater than `y`, respectively. Compares `*this` with `y`, using a total ordering which is a refinement of the limited growth ordering relation for the BHRZ03 widening.