Baer invariants of crossed modules
ISSN: 0213-8743
Ano de publicación: 1991
Volume: 6
Número: 1
Páxinas: 35-38
Tipo: Artigo
Outras publicacións en: Extracta mathematicae
Resumo
The purpose of this paper is to establish a theory of Baer invariants, associated to certain types of varieties of (pre)crossed modules, and to obtain a five term exact sequence and 'the basic theorem' of Stallings in this setting. Our method, which extends results of [4] and aspects of [9], gives a systematic treatment for several cases.