GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it
############################################################################# ## ## ConvexObject.gd Convex package Sebastian Gutsche ## ## Copyright 2011-2012 Lehrstuhl B für Mathematik, RWTH Aachen ## ## The Main Object to be viewed, is almost everything that has a number ;). ## ############################################################################# ################################ ## ## Attributes ## ################################ ## InstallMethod( ContainingGrid, " for convex objects", [ IsConvexObject ], function( convobj ) return AmbientSpaceDimension( convobj ) * HOMALG_MATRICES.ZZ; end ); ################################ ## ## Basic Properties ## ################################ ## InstallMethod( WeakPointerToExternalObject, "for external objects", [ IsExternalConvexObjectRep ], function( convobj ) return ExternalObject( convobj ); end ); ## InstallMethod( DrawObject, " for external objects", [ IsExternalConvexObjectRep ], function( convobj ) return EXT_DRAW( ExternalObject( convobj ) ); end ); ## InstallMethod( ExternalObject, "for convex objects", [ IsExternalConvexObjectRep ], function( convobj ) Error( "something went wrong\n" ); TryNextMethod(); end );