org.gradoop.common.util

Class MathHelper

java.lang.Object

org.gradoop.common.util.MathHelper

public abstract class MathHelper
extends Object

Contains math helper methods.

Constructor Summary

Constructors

Constructor and Description
MathHelper()

Method Summary

Modifier and Type	Method and Description
static long	cantor(long x, long y) Pairing function to uniquely encode two natural numbers into a single number.
static long[]	reverseCantor(long z) Creates number pair from given cantor number.

Methods inherited from class java.lang.Object

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

Constructor Detail

MathHelper

public MathHelper()

Method Detail

cantor

public static long cantor(long x,
                          long y)

Pairing function to uniquely encode two natural numbers into a single number.

Parameters:

x - first number (>= 0)

y - second number (>= 0)

Returns:

uniquely encoded natural number

reverseCantor

public static long[] reverseCantor(long z)

Creates number pair from given cantor number.

Parameters:

z - cantor number

Returns:

first and second number