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math.CO2022★ 1 cited
Support of extremal doubly stochastic arrays
Mark Mordechai Etkind, Nir Lev
An array with nonnegative entries is called doubly stochastic if the sum of its entries at each row is and at each column is . The set of all doubl…
math.CO2018★ 11 cited
Multi-tiling and equidecomposability of polytopes by lattice translates
Nir Lev, Bochen Liu
We characterize the polytopes in (not necessarily convex or connected ones) which multi-tile the space by translations along a given lattice. We also give a necessar…