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Number systems over orders.


ABSTRACT: Let K be a number field of degree k and let O be an order in K . A generalized number system over O (GNS for short) is a pair (p,D) where p?O[x] is monic and D?O is a complete residue system modulo p(0) containing 0. If each a?O[x] admits a representation of the form a??j=0?-1djxj(modp) with ??N and d0,…,d?-1?D then the GNS (p,D) is said to have the finiteness property. To a given fundamental domain F of the action of Zk on Rk we associate a class GF:={(p,DF):p?O[x]} of GNS whose digit sets DF are defined in terms of F in a natural way. We are able to prove general results on the finiteness property of GNS in GF by giving an abstract version of the well-known "dominant condition" on the absolute coefficient p(0) of p. In particular, depending on mild conditions on the topology of F we characterize the finiteness property of (p(x±m),DF) for fixed p and large m?N . Using our new theory, we are able to give general results on the connection between power integral bases of number fields and GNS.

SUBMITTER: Petho A 

PROVIDER: S-EPMC6190796 | biostudies-other | 2018

REPOSITORIES: biostudies-other

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Number systems over orders.

Pethő Attila A   Thuswaldner Jörg J  

Monatshefte fur Mathematik 20180518 4


Let K be a number field of degree <i>k</i> and let O be an order in K . A <i>generalized number system over</i> O (GNS for short) is a pair ( p , D ) where p ∈ O [ x ] is monic and D ⊂ O is a complete residue system modulo <i>p</i>(0) containing 0. If each a ∈ O [ x ] admits a representation of the form a ≡ ∑ j = 0 ℓ - 1 d j x j ( mod p ) with ℓ ∈ N and d 0 , … , d ℓ - 1 ∈ D then the GNS ( p , D ) is said to have the <i>finiteness property</i>. To a given fundamental domain F of th  ...[more]

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