numeric-prelude-0.0.2: An experimental alternative hierarchy of numeric type classes Source code Contents Index

MathObj.Permutation.Table Portability Permutation represented by an array of the images. Stability provisional Maintainer numericprelude@henning-thielemann.de

Description

Synopsis

type T i = Array i i fromFunction :: Ix i => (i, i) -> (i -> i) -> T i toFunction :: Ix i => T i -> i -> i fromPermutation :: (Ix i, C p) => p i -> T i fromCycles :: Ix i => (i, i) -> [[i]] -> T i identity :: Ix i => (i, i) -> T i cycle :: Ix i => [i] -> T i -> T i inverse :: Ix i => T i -> T i compose :: Ix i => T i -> T i -> T i swap :: (a, b) -> (b, a) choose :: Set a -> Maybe (a, Set a) closure :: Ix i => [T i] -> [T i] closureSlow :: Ix i => [T i] -> [T i]

Documentation

type T i = Array i i Source

fromFunction :: Ix i => (i, i) -> (i -> i) -> T i Source

toFunction :: Ix i => T i -> i -> i Source

fromPermutation :: (Ix i, C p) => p i -> T i Source

fromCycles :: Ix i => (i, i) -> [[i]] -> T i Source

identity :: Ix i => (i, i) -> T i Source

cycle :: Ix i => [i] -> T i -> T i Source

inverse :: Ix i => T i -> T i Source

compose :: Ix i => T i -> T i -> T i Source

swap :: (a, b) -> (b, a) Source

candidate for Utility

choose :: Set a -> Maybe (a, Set a) Source

Extremely nave algorithm to generate a list of all elements in a group. Should be replaced by a Schreier-Sims system if this code is ever used for anything bigger than .. say .. groups of order 512 or so.

closure :: Ix i => [T i] -> [T i] Source

closureSlow :: Ix i => [T i] -> [T i] Source

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