Package org.oristool.math.expression

Class MathUtil

java.lang.Object

org.oristool.math.expression.MathUtil

public final class MathUtil
extends Object

Mathematical calculations.

Constructor Summary

Constructors

Constructor	Description
MathUtil()

Method Summary

Modifier and Type	Method	Description
static BigInteger	calculateBinomialCoefficient(Integer n, Integer k)	Computes the binomial coefficient "n choose k".
static BigInteger	calculateFactorial(int n)	Computes the factorial n!.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

MathUtil

public MathUtil()

Method Details

calculateBinomialCoefficient

public static BigInteger calculateBinomialCoefficient(Integer n,
 Integer k)

Computes the binomial coefficient "n choose k".

Parameters:

n - set size

k - elements to choose

Returns:

number of ways to choose k elements, disregarding their order

calculateFactorial

public static BigInteger calculateFactorial(int n)

Computes the factorial n!.

Parameters:

n - set size

Returns:

distinct ordered permutations of n objects