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On the non-existence of lattice tilings by quasi-crosses

Moshe Schwartz

Published 2012 in Information Theory and Applications Workshop

ABSTRACT

We study necessary conditions for the existence of lattice tilings of Rn by quasi-crosses. We prove general non-existence results using a variety of number-theoretic tools. We then apply these results to the two smallest unclassified shapes, the (3, 1, n)-quasi-cross and the (3, 2, n)-quasi-cross. We show that for dimensions n ≤ 250, apart from the known constructions, there are no lattice tilings of Rn by (3, 1, n)-quasi-crosses except for ten remaining unresolved cases, and no lattice tilings of Rn by (3, 2, n)-quasi-crosses except for eleven remaining unresolved cases.

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