Abstract:
Small covers arising from three-dimensional simple polytopes are an interesting class of 3-manifolds. The fundamental group is a rigid invariant for wide classes of 3-manifolds, particularly for orientable Haken manifolds, which include orientable small covers over flag polytopes. By using the Morse-theoretic approach, we give a procedure to get an explicit balanced presentation of the fundamental group of a closed orientable three-dimensional small cover with minimal number of generators. Our procedure is completely algorithmic and geometrical.
Keywords:
fundamental group, Haken manifold, three-dimensional simple polytope.
This research was supported by the Science Fund of the Republic of Serbia, grant no. 7744592, Integrability and Extremal Problems in Mechanics, Geometry and Combinatorics – MEGIC.
Citation:
Vladimir Grujić, “Fundamental Groups of Three-Dimensional Small Covers”, Toric Topology, Group Actions, Geometry, and Combinatorics. Part 1, Collected papers, Trudy Mat. Inst. Steklova, 317, Steklov Math. Inst., М., 2022, 89–106; Proc. Steklov Inst. Math., 317 (2022), 78–93