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This perl library aims to provide as many tools to make it as simple as possible to calculate distances between geographic points, and anything that can be derived from that. Currently there is support for finding the closest locations within a specified distance, to find the closest number of points to a specified point, and to do basic point-to-point distance calculations.

This is Graph, the Perl module for graph operations as the code was for the 1st edition of "Mastering Algorithms with Perl", by Jon Orwant, Jarkko Hietaniemi, and John Macdonald, published in August 1999 by the O'Reilly and Associates. -Anton <tobez@FreeBSD.org>

Math::Gradient is used to calculate smooth transitions between numerical values (also known as a "Gradient"). I wrote this module mainly to mix colours, but it probably has several other applications. Methods are supported to handle both basic and multiple-point gradients, both with scalars and arrays.

BaseCnv provides a few simple functions for converting between arbitrary number bases. It is as fast as I currently know how to make it (of course relying only on the lovely Perl). If you would rather utilize an object syntax for number-base conversion, please see Ken Williams's <Ken@Forum.Swarthmore.Edu> fine Math::BaseCalc module.

Perl's built-in logical operators, C<and>, C<or>, C<xor> and C<not> support 2-value logic. This means that they always produce a result which is either true or false. In fact perl sometimes returns 0 and sometimes returns undef for false depending on the operator and the order of the arguments. For "true" Perl generally returns the first value that evaluated to true which turns out to be extremely useful in practice. Given the choice Perl's built-in logical operators are to be preferred -- but when you really want pure 2-degree logic or 3-degree logic or multi-degree logic they are available through this module

Math::BigInt - Arbitrary size integer math package for perl. This is a complete rewrite of Math::BigInt, Math::BigFloat and friends, which are included with the standard system perl.

Math::BigRat complements Math::BigInt and Math::BigFloat by providing support for arbitrary big rational numbers.

Math::Matrix is a Perl module that performs a number of common matrix operations.

This module provides an interface to over 150 functions of the cephes math library of Stephen Moshier. No functions are exported by default, but rather must be imported explicitly, as in use Math::Cephes qw(sin cos); There are a number of export tags defined which allow importing groups of functions.

Math::Currency is a perl module that implements exact currency math with formatting and rounding.