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#############################################################################
## This program is free software: you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation, either version 2 of the License, or
## (at your option) any later version.
##
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU General Public License for more details.
##
#W simpleChains.gd Ruth Hoffmann
##
##
#Y Copyright (C) 2004-2015 School of Computer Science,
#Y University of St. Andrews, North Haugh,
#Y St. Andrews, Fife KY16 9SS, Scotland
##
################################################################################
##
#F OnePointDelete(perm)
##
## OnePointDelete removes single points in the simple permutation and returns
## a list of the resulting simple permutations, in their rank encoding.
##
DeclareGlobalFunction( "OnePointDelete" );
################################################################################
##
#F TwoPointDelete(perm)
##
## TwoPointDelete removes two points of the input exceptional permutation and
## returns the list of the unique resulting permutation, in its rank encoding.
##
DeclareGlobalFunction( "TwoPointDelete" );
################################################################################
##
#F PointDeletion(perm)
##
## PointDeletion, takes any simple permutation does not matter whether
## exceptional or not and removes the right number of points.
##
DeclareGlobalFunction( "PointDeletion" );
########
## Experimental, undocumented code to get the language of simple permutations
## with one more point.
########
################################################################################
##
#F NonSimpleOnePointAdditionTransducer(length,k)
##
## Constructs an transducer that when applied to an language, finds all the words
## with an additional letter which seem are not simple permutations.
##
DeclareGlobalFunction( "NonSimpleOnePointAdditionTransducer" );
################################################################################
##
#F OneStepSimplePermsAut(perms)
##
## Takes in a list of rank encoded simple permutations, of the same length and
## returns the simple permutations that are have one additional point and are
## encoded using the same alphabet.
##
DeclareGlobalFunction( "OneStepSimplePermsAut" );
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