On π-surfaces of four-dimensional parallelohedra
Abstract
We show that every four-dimensional parallelohedron P satisfies a recently found condition of Garber, Gavrilyuk & Magazinov sufficient for the Voronoi conjecture being true for P. Namely we show that for every four-dimensional parallelohedron P the group of rational first homologies of its π-surface is generated by half-belt cycles.
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