On π-surfaces of four-dimensional parallelohedra
arXiv:1309.7661 · doi:10.1007/s00026-017-0366-9
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.
16 pages, 7 figures