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.. Copyright (c) 2019, J. D. Mitchell
Distributed under the terms of the GPL license version 3.
The full license is in the file LICENSE, distributed with this software.
Congruences
===========
.. cpp:namespace:: libsemigroups
``libsemigroups`` implements several algorithms for computing a congruence of
a semigroup or monoid. The main algorithms implemented are Todd-Coxeter,
Knuth-Bendix, algorithms for C(4) small overlap monoids (by Kambites and
Tsalakou),and brute-force enumeration; see the links below for further details.
As a convenience, ``libsemigroups`` also has a class
:cpp:type:`libsemigroups::Congruence` that runs some predetermined variants of
Todd-Coxeter, Knuth-Bendix, the small overlap algorithms, and the brute-force
enumeration in parallel. This class is, at present, not very customisable, and
lacks some of the fine grained control offered by the classes implementing
individual algorithms, such as :cpp:type:`congruence::ToddCoxeter`,
:cpp:type:`congruence::KnuthBendix`, and :cpp:type:`congruence::Kambites`.
All of the classes for congruences in ``libsemigroups`` can be used
"interactively", in the sense that they can be run for a particular amount of
time, or until some condition is met; for further details see, for example,
:cpp:func:`Runner::run_for` and
:cpp:func:`Runner::run_until`.
The "handedness" of a congruence is determined by:
.. doxygenenum:: libsemigroups::congruence_kind
:project: libsemigroups
The classes in ``libsemigroups`` for congruences are:
.. toctree::
:maxdepth: 1
_generated/libsemigroups__congruenceinterface
_generated/libsemigroups__congruence
_generated/libsemigroups__congruencebypairs
_generated/libsemigroups__congruence__toddcoxeter
_generated/libsemigroups__congruence__knuthbendix
_generated/libsemigroups__congruence__kambites
_generated/libsemigroups__knuthbendixcongruencebypairs
sims1
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