On Algebraic Models for Homotopy 3-Types

Z. Arvasi and E. Ulualan

We explore the relations among quadratic modules, 2-crossed modules, crossed squares and simplicial groups with Moore complex of length 2.

Journal of Homotopy and Related Structures, Vol. 1(2006), No. 1, pp. 1-27

http://jhrs.rmi.acnet.ge/volumes/2006/n1a1/