Package org.apache.commons.numbers.gamma
Class Trigamma
- java.lang.Object
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- org.apache.commons.numbers.gamma.Trigamma
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public final class Trigamma extends java.lang.Object
Trigamma function. It is the derivative of thedigamma function
: \( \psi_1(x) = \frac{d^2}{dx^2} (\ln \Gamma(x)) \).
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Constructor Summary
Constructors Modifier Constructor Description private
Trigamma()
Private constructor.
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static double
value(double x)
Computes the trigamma function.
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Field Detail
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C_LIMIT
private static final double C_LIMIT
C limit.- See Also:
- Constant Field Values
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S_LIMIT
private static final double S_LIMIT
S limit.- See Also:
- Constant Field Values
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F_1_6
private static final double F_1_6
Fraction.- See Also:
- Constant Field Values
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F_1_30
private static final double F_1_30
Fraction.- See Also:
- Constant Field Values
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F_1_42
private static final double F_1_42
Fraction.- See Also:
- Constant Field Values
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