LogGammaSum

java.lang.Object

org.apache.commons.numbers.gamma.LogGammaSum

final class LogGammaSum extends Object

Computes \( \log_e(\Gamma(a+b)) \).

This class is immutable.

Constructor Summary

Constructors

Modifier

Constructor

Description

private

LogGammaSum()

Private constructor.
Method Summary

Modifier and Type

Method

Description

(package private) static double

value(double a, double b)

Computes the value of log Γ(a + b) for 1 ≤ a, b ≤ 2.

Methods inherited from class Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details
- LogGammaSum
  
  private LogGammaSum()
  
  Private constructor.
Method Details
- value
  
  static double value(double a, double b)
  
  Computes the value of log Γ(a + b) for 1 ≤ a, b ≤ 2. Based on the NSWC Library of Mathematics Subroutines implementation, DGSMLN.
  
  Parameters:
  
  a - First argument.
  
  b - Second argument.
  
  Returns:
  
  the value of log(Gamma(a + b)).
  
  Throws:
  
  IllegalArgumentException - if a or b is lower than 1 or larger than 2.