The ring of arithmetical functions with unitary convolution: General Truncations

Details The ring of arithmetical functions with unitary convolution: General Truncations The ring of arithmetical functions with unitary convolution: General Truncations

2002-05-23

arxiv.org/abs/math/0205242v1

Int. J. Math. Game Theory Algebra 13 (2003), no. 6, 485--519

Mathematics

Commutative Algebra

27 pages, LaTeX2e

Scientific paper

Let A denote the ring of arithmetical functions with unitary convolution, and let V be a finite subset of the positive integers having the property that for every v in V, all unitary divisors of v lie in V. We study the truncation A_V, an artinian monomial quotient of a polynomial ring in finitely many indeterminates, isomorphic to the ``Artinified'' Stanley-Reisner ring C[\bar{\Delta(V)}] of a certain simplicial complex \Delta(V).

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