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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 graphAut.gd Michael Albert,
#W Steve Linton,
#W 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 IsPossibleGraphAut(aut)
##
## Checks if the input automaton could represent a token passing network.
##
DeclareGlobalFunction( "IsPossibleGraphAut" );
#############################################################################
##
#F IsStarClosed(aut)
##
## Checks if intial state and accept state are the same.
##
DeclareGlobalFunction( "IsStarClosed" );
#############################################################################
##
#F Is2StarReplaceable(aut)
##
## Returns true if there is no state with transition, containing the first
## letter, to the initial state, or if there is at least one state with such
## a transition, then the transition, containing the second letter, from
## that state has to either map to it self or another state with the same
## condition on its transitions.
##
DeclareGlobalFunction( "Is2StarReplaceable" );
#############################################################################
##
#F IsStratified(aut)
##
## Checks if automaton can be represented in a "layered" manner.
##
DeclareGlobalFunction( "IsStratified" );
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