permutation-representations

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Eidonko / Permutation-numbers

Permutations can be considered as the orbits of a dynamic system p' = succ(p), where p is a permutation and p' is its successor in the lexycographically ordered set of permutations (plus the Nil permutation, whose successor is Nil). Here I present a function that produces those orbits as well as a number of "permutation numbers" derived from tho…

permutations c-language dynamic-systems permutation-algorithms cweb-programs c-lang permutation-representations permutation-numbers permutations-of-words

Updated May 29, 2018
CWeb

0joshuaolson1 / factoradic

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Invertible transformations on permutation representations, including an RNG-free in-place Fisher-Yates-Knuth shuffle https://www.npmjs.com/package/factoradic

permutation permutations shuffle fisher-yates-shuffle permutation-algorithms in-place factoradic-base factoradic-number-system factorial-base factorial-number-system in-place-shuffle permutation-number permutation-representations

Updated Jul 24, 2018
JavaScript

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