semigroups: Haskell 98 semigroups

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Haskell 98 semigroups

In mathematics, a semigroup is an algebraic structure consisting of a set together with an associative binary operation. A semigroup generalizes a monoid in that there might not exist an identity element. It also (originally) generalized a group (a monoid with all inverses) to a type where every element did not have to have an inverse, thus the name semigroup.

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Dependencies	base (>=2 && <5), bytestring (>=0.9 && <0.11), containers (>=0.3 && <0.6), hashable (>=1.1 && <1.3), nats (>=0.1 && <1), text (>=0.10 && <0.12), unordered-containers (==0.2.*) [details]
License	BSD-3-Clause
Copyright	Copyright (C) 2011 Edward A. Kmett
Author	Edward A. Kmett
Maintainer	Edward A. Kmett <ekmett@gmail.com>
Category	Algebra, Data, Data Structures, Math
Home page	http://github.com/ekmett/semigroups/
Bug tracker	http://github.com/ekmett/semigroups/issues
Source repo	head: git clone git://github.com/ekmett/semigroups.git
Uploaded	by EdwardKmett at Mon Sep 16 20:25:56 UTC 2013
Distributions	Arch:0.18.4, Debian:0.18.0.1, Fedora:0.18.3, FreeBSD:0.16.2.2, LTSHaskell:0.18.4, NixOS:0.18.4, Stackage:0.18.4, openSUSE:0.18.4
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