GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it
ReadPackage("HAPcryst","lib/environment.gi"); ### ####### a few things about datatypes and conversion ####### aka. "the nerdy stuff" ### ReadPackage("HAPcryst","lib/GroupRing.gi"); ReadPackage("HAPcryst","lib/datatypes/resolutionAccess_generic.gi"); ReadPackage("HAPcryst","lib/datatypes/resolutionAccess_GroupRing.gi"); ReadPackage("HAPcryst","lib/CWcomplexThings.gi"); ReadPackage("HAPcryst","lib/CWcomplexThings_GroupRingRep.gi"); ######## ReadPackage("HAPcryst","lib/misc.gi"); ReadPackage("HAPcryst","lib/spacegroups.gi"); ReadPackage("HAPcryst","lib/translations.gi"); ReadPackage("HAPcryst","lib/geometry.gi"); #ReadPackage("HAPcryst","lib/PartialHasseDiagramByGroup.gi"); ReadPackage("HAPcryst","lib/FaceLatticeAndBoundaryBieberbachGroup.gi"); ReadPackage("HAPcryst","lib/resolutionBieberbach.gi"); ReadPackage("HAPcryst","lib/FundamentalDomain.gi"); ReadPackage("HAPcryst","lib/FundamentalDomainStandardSP.gi"); ReadPackage("HAPcryst","lib/FundamentalDomainBieberbach.gi");