caa a22 4500 386384940 CHVBK 20180307112055.0 cr unu---uuuuu 161130e198909 xx s 000 0 eng 10.1017/S0305004100078038 doi S0305004100078038 pii (NATIONALLICENCE)cambridge-10.1017/S0305004100078038 Equivalences of two-complexes, with applications to NEC-groups [Elektronische Daten] In [17] the second author introduced the concept of an involutary presentation. Such presentations are useful when one wants to deal geometrically with groups which have generators of order two. Now if one wants to deal with subgroups of such groups then it is no longer adequate to stick to presentations - one must consider arbitrary 2-complexes. However, these 2-complexes will differ from those which are usually considered, in that we need to allow some edges to be equal to their inverses. Copyright © Cambridge Philosophical Society 1989 Fennessey Eric J. Department of Mathematics, University of Glasgow, Glasgow G12 8QW Pride Stephen J. Department of Mathematics, University of Glasgow, Glasgow G12 8QW Mathematical Proceedings of the Cambridge Philosophical Society Cambridge University Press 106/2(1989-09), 215-228 0305-0041 106:2<215 1989 106 PSP https://doi.org/10.1017/S0305004100078038 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0305004100078038 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Fennessey Eric J. Department of Mathematics, University of Glasgow, Glasgow G12 8QW NATIONALLICENCE 700 1- Pride Stephen J. Department of Mathematics, University of Glasgow, Glasgow G12 8QW NATIONALLICENCE 773 0- Mathematical Proceedings of the Cambridge Philosophical Society Cambridge University Press 106/2(1989-09), 215-228 0305-0041 106:2<215 1989 106 PSP CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge