Factoring a finite Abelian group by prime complexes.
Factoring Abelian groups of order .
Factoring an odd abelian group by lacunary cyclic subsets
It is a known result that if a finite abelian group of odd order is a direct product of lacunary cyclic subsets, then at least one of the factors must be a subgroup. The paper gives an elementary proof that does not rely on characters.
Factoring by nonsubgroup factors.
Factorization results with combinatorial proofs.
Filling a box with translates of two bricks.
Four series of hyperbolic space groups with simplicial domains, and their supergroups
Fractal Penrose tiles II: Tiles with fractal boundary as duals of Penrose triangles.