### Math::Combinatorics - Perform combinations and permutations on lists River stage two • 5 direct dependents • 17 total dependents 4 ++

Combinatorics is the branch of mathematics studying the enumeration, combination, and permutation of sets of elements and the mathematical relations that characterize their properties. As a jumping off point, refer to: http://mathworld.wolfram.com/Co...

/Math-Combinatorics-0.09 - 12 Dec 2006 07:04:03 UTC

### Math::Counting - Combinatorial counting operations River stage one • 1 direct dependent • 1 total dependent ++

Compute the factorial, number of permutations, number of derangements and number of combinations. The ":big" functions are wrappers around "bfac" in Math::BigInt with a bit of arithmetic between. The student versions exist to illustrate the computati...

/Math-Counting-0.1307 - 30 Oct 2019 16:09:23 UTC

### Math::DyckWords - Perl module for generating Dyck words. Dyck words are named after the mathematician Walther von Dyck. River stage zero No dependents ++

Dyck words are even numbered string of X's and Y's, or 0's and 1's, or any other binary alphabet for that matter, such that no initial segment has more Y's or 1's. The following are the Dyck words of length 2n where n = 3: 000111 010011 010101 001101...

/Math-DyckWords-0.03 - 14 Apr 2010 03:48:57 UTC

### Telephone::Mnemonic::US::Math - Helper module that for combinatorics pertaining to mnemonic calculations River stage zero No dependents ++

/Telephone-Mnemonic-US-0.07 - 17 Oct 2011 09:40:11 UTC

### Math::Prime::Util - Utilities related to prime numbers, including fast sieves and factoring River stage two • 12 direct dependents • 18 total dependents 19 ++

A module for number theory in Perl. This includes prime sieving, primality tests, primality proofs, integer factoring, counts / bounds / approximations for primes, nth primes, and twin primes, random prime generation, and much more. This module is th...

/Math-Prime-Util-0.73 - 15 Nov 2018 18:56:14 UTC

### Math::NumSeq::Factorials - factorials i! = 1*2*...*i River stage zero No dependents 3 ++

The factorials being product 1*2*3*...*i, 1 to i inclusive. 1, 2, 6, 24, 120, 720, ... starting i=1...

/Math-NumSeq-74 - 23 Feb 2020 03:55:27 UTC

### Math::DifferenceSet::Planar - object class for planar difference sets River stage zero No dependents 1 ++

A planar difference set in a modular integer ring ℤ_n, or cyclic planar difference set, is a subset D = {d_1, d_2, ..., d_k} of ℤ_n such that each nonzero element of ℤ_n can be represented as a difference (d_i - d_j) in exactly one way. By convention...

/Math-DifferenceSet-Planar-0.013 - 21 Mar 2021 16:50:55 UTC

### Math::PlanePath::HilbertCurve - 2x2 self-similar quadrant traversal River stage one • 3 direct dependents • 4 total dependents 2 ++

This path is an integer version of the curve described by Hilbert in 1891 for filling a unit square. It traverses a quadrant of the plane one step at a time in a self-similar 2x2 pattern, David Hilbert, "Ueber die stetige Abbildung einer Linie auf ei...

/Math-PlanePath-129 - 19 Jan 2021 06:32:01 UTC
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