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Representing lattices by homotopy groups of graphs

Comment.Math.Univ.Carolinae 40,2 (1999) 215-221.

Abstract:In this paper we represent every lattice by subgroups of free groups using the concept of the homotopy group of a graph.

Keywords: subgroup lattice, lattice embedding, free group, homotopy group
AMS Subject Classification: 06B15, 20E05, 20E15