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Elasticity in orders of an algebraic number field with radical conductor ideal and their rings of formal power series

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arxiv 2505.01668 v1 pith:WDLXE2MB submitted 2025-05-03 math.AC

classification math.AC
keywords ordersfieldringsnumberpowerseriesalgebraicelasticity
verification ladder T0 review T1 audit T2 compute T3 formal
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Orders in an algebraic number field form a class of rings which are of special historical interest to the field of factorization theory. One of the primary tools used to study factorization is elasticity - a measure of how badly unique factorization fails in a domain. This paper explores properties of orders in a number field and how they can be used to study elasticity in not only the orders themselves, but also in rings of formal power series over the orders. Of particular interest is the fact, proven here, that power series extensions in finitely many variables over half-factorial rings of algebraic integers must themselves be half-factorial. It is also shown that the HFD property is not preserved in general for power series rings over non-integrally closed orders in a number field.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Elasticity of Orders from the $S$-relative Davenport Constant: an Arithmetic Application of a Number-Theoretic Investigation

    math.AC 2026-05 unverdicted novelty 7.0 of 10

    Exact elasticity formulas for orders with prime or primary conductor are proven via a new S-relative Davenport constant, with a partial resolution of the intermediate-order elasticity conjecture.

  2. (Locally) Associated Subrings in Polynomial and Power Series Extensions

    math.AC 2026-08 accept novelty 6.0 of 10

    Full necessary-and-sufficient conditions are given for coefficient-varying polynomial and power series rings to be (locally) associated subrings of larger such rings, with consequences for half-factorial power series ...

  3. On $q$-real and $q$-complex numbers

    math.CV 2025-08 unverdicted novelty 6.0 of 10

    For every real x > 1 the q-real series [x]_q converges in the disk |q| < 3−2√2 to a nonvanishing holomorphic function, partially proving the radius-convergence conjecture.

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