# QuantLib_ProbabilityBoltzmannDownhill man page

ProbabilityBoltzmannDownhill — Boltzmann Downhill Probability.

## Synopsis

`#include <ql/experimental/math/hybridsimulatedannealingfunctors.hpp>`

### Public Member Functions

**ProbabilityBoltzmannDownhill** (unsigned long seed=0)**ProbabilityBoltzmannDownhill** (const **ProbabilityBoltzmannDownhill** &probability)

bool **operator()** (**Real** currentValue, **Real** newValue, const **Array** &temp) const

## Detailed Description

Boltzmann Downhill Probability.

Similarly to the Boltzmann Probability, but if new < current, then the point is always accepted.

## Author

Generated automatically by Doxygen for QuantLib from the source code.

## Referenced By

ProbabilityBoltzmannDownhill(3) is an alias of QuantLib_ProbabilityBoltzmannDownhill(3).

Fri Feb 10 2017 Version 1.9.1 QuantLib