Abstract
Two formulae for the number of sublattices of a given index k of an n-dimensional lattice are presented. They are based on the decomposition of the index k into a product of prime numbers and have the form of a rational function of these primes. Compared with other known methods, they can give the result in a much quicker and more comfortable way.
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Schedule a callMore From: Acta Crystallographica Section A Foundations of Crystallography
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