About: http://webisa.webdatacommons.org/166826198

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	This morphism is an isomorphism of free crossed complexes if X *,Y *X_*, Y_* are the skeletal filtrations of CW-complexes.
http://www.w3.org/ns/prov#wasQuotedFrom	ncatlab.org