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GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it

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#############################################################################
##
##                  GeneralizedMorphismsForCAP package
##
##  Copyright 2015, Sebastian Gutsche, TU Kaiserslautern
##                  Sebastian Posur,   RWTH Aachen
##
#! @Chapter Conversion functors for generalized morphisms
##
#############################################################################

####################################
##
#! @Section Functors from Cospans
##
####################################

#! @Description
#!  For the given category <A>C</A>, this attribute is the functor from
#!  the cospan generalized morphism category of <A>C</A> to the generalized
#!  morphism category modeled by three arrows.
#! @Arguments C
#! @Returns a functor
DeclareAttribute( "FunctorFromCospansToThreeArrows",
                  IsCapCategory );

#! @Description
#!  For the given category <A>C</A>, this attribute is the functor from
#!  the cospan generalized morphism category of <A>C</A> to the generalized
#!  morphism category modeled by spans.
#! @Arguments C
#! @Returns a functor
DeclareAttribute( "FunctorFromCospansToSpans",
                  IsCapCategory );

####################################
##
#! @Section Functors from Spans
##
####################################

#! @Description
#!  For the given category <A>C</A>, this attribute is the functor from
#!  the span generalized morphism category of <A>C</A> to the generalized
#!  morphism category modeled by three arrows.
#! @Arguments C
#! @Returns a functor
DeclareAttribute( "FunctorFromSpansToThreeArrows",
                  IsCapCategory );

#! @Description
#!  For the given category <A>C</A>, this attribute is the functor from
#!  the span generalized morphism category of <A>C</A> to the generalized
#!  morphism category modeled by cospans.
#! @Arguments C
#! @Returns a functor
DeclareAttribute( "FunctorFromSpansToCospans",
                  IsCapCategory );

####################################
##
#! @Section Functors from Three Arrows
##
####################################

#! @Description
#!  For the given category <A>C</A>, this attribute is the functor from
#!  the three arrow generalized morphism category of <A>C</A> to the generalized
#!  morphism category modeled by cospans.
#! @Arguments C
#! @Returns a functor
DeclareAttribute( "FunctorFromThreeArrowsToCospans",
                  IsCapCategory );

#! @Description
#!  For the given category <A>C</A>, this attribute is the functor from
#!  the three arrow generalized morphism category of <A>C</A> to the generalized
#!  morphism category modeled by spans.
#! @Arguments C
#! @Returns a functor
DeclareAttribute( "FunctorFromThreeArrowsToSpans",
                  IsCapCategory );