Free Crossed Resolutions of Groups and Presentations of Modules of Identities among Relations
Free Crossed Resolutions of Groups and Presentations of Modules of Identities among Relations
Abstract The paper gives formulae for a module presentation of the module of identities among relations for a presentation of a group, in terms of information on 0- and 1-combings of the Cayley graph. These formulae are seen as a special case of formulae for extending a partial free crossed …