invIncGamma.C File Reference

Function to calculate the inverse of the normalized incomplete gamma function. More...

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## Namespaces | |

Foam | |

Namespace for OpenFOAM. | |

## Functions | |

static scalar | minimaxs (const scalar P) |

static scalar | Sn (const scalar a, const scalar x) |

Function to calculate the inverse of the normalized incomplete gamma function.

**Original source file** invIncGamma.C

The algorithm is described in detain in reference:

DiDonato, A. R., & Morris Jr, A. H. (1986). Computation of the incomplete gamma function ratios and their inverse. ACM Transactions on Mathematical Software (TOMS), 12(4), 377-393.

All equation numbers in the following code refer to the above text and the algorithm in the function 'invIncGamma' is described in section 4.

Definition in file invIncGamma.C.