The ring of arithmetical functions with unitary convolution: the [n]-truncation
classification
🧮 math.AC
keywords
functionsringarithmeticalcertainconvolutiontruncationunitaryarguments
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We study a certain truncation of the ring of arithmetical functions with unitary convolution, consisting of functions vanishing on arguments >n. The truncations are artinian monomial quotients of a polynomial ring in finitely many indeterminates, and are isomorphic to the ``artinified'' Stanley-Reisner rings of certain simplicial complexes.
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