scholarly journals Stacked submodules of torsion modules over discrete valuation domains

2003 ◽  
Vol 68 (3) ◽  
pp. 439-447 ◽  
Author(s):  
Pudji Astuti ◽  
Harald K. Wimmer
Keyword(s):  
Valuation Domain ◽  
Torsion Module ◽  
Discrete Valuation Domain ◽  
Valuation Domains ◽  
Torsion Modules

A submodule W of a torsion module M over a discrete valuation domain is called stacked in M if there exists a basis ℬ of M such that multiples of elements of ℬ form a basis of W. We characterise those submodules which are stacked in a pure submodule of M.

scholarly journals On the Factorization of Polynomials Over Discrete Valuation Domains

2014 ◽  
Vol 22 (1) ◽  
pp. 273-280
Author(s):  
Doru Ştefănescu
Keyword(s):  
Valuation Domain ◽  
Discrete Valuation Domain ◽  
Valuation Domains ◽  
Univariate Polynomials ◽  
Factorization Of Polynomials

AbstractWe study some factorization properties for univariate polynomials with coefficients in a discrete valuation domain (A,v). We use some properties of the Newton index of a polynomial to deduce conditions on v(ai) that allow us to find some information on the degree of the factors of F.

On the projectivity of proper normal curves over valuation domains

2021 ◽  
pp. 2250183
Author(s):  
Hagen Knaf
Keyword(s):  
Projective Dimension ◽  
Valuation Domain ◽  
Zariski Closure ◽  
Noetherian Rings ◽  
Regular Curve ◽  
Generic Fiber ◽  
Discrete Valuation Domain ◽  
Closed Point ◽  
Valuation Domains ◽  
Normal Formula

A theorem of Lichtenbaum states, that every proper, regular curve [Formula: see text] over a discrete valuation domain [Formula: see text] is projective. This theorem is generalized to the case of an arbitrary valuation domain [Formula: see text] using the following notion of regularity for non-noetherian rings introduced by Bertin: the local ring [Formula: see text] of a point [Formula: see text] is called regular, if every finitely generated ideal [Formula: see text] has finite projective dimension. The generalization is a particular case of a projectivity criterion for proper, normal [Formula: see text]-curves: such a curve [Formula: see text] is projective if for every irreducible component [Formula: see text] of its closed fiber [Formula: see text] there exists a closed point [Formula: see text] of the generic fiber of [Formula: see text] such that the Zariski closure [Formula: see text] meets [Formula: see text] and meets [Formula: see text] in regular points only.

scholarly journals ℵn-FREE MODULES OVER COMPLETE DISCRETE VALUATION DOMAINS WITH ALMOST TRIVIAL DUAL

2013 ◽  
Vol 55 (2) ◽  
pp. 369-380 ◽  
Author(s):  
RÜDIGER GÖBEL ◽  
SAHARON SHELAH ◽  
LUTZ STRÜNGMANN
Keyword(s):  
Natural Number ◽  
Commutative Ring ◽  
Set Theory ◽  
Black Box ◽  
Combinatorial Principle ◽  
Infinite Rank ◽  
Discrete Valuation Domain ◽  
Valuation Domains ◽  
Free Modules ◽  
Torsion Modules

AbstractA module M over a commutative ring R has an almost trivial dual if there is no homomorphism from M onto a free R-module of countable infinite rank. Using a new combinatorial principle (the ℵn-Black Box), which is provable in ordinary set theory, we show that for every natural number n, there exist arbitrarily large ℵn-free R-modules with almost trivial duals, when R is a complete discrete valuation domain. A corresponding result for torsion modules is also obtained.

Separable torsion modules over valuation domains

1983 ◽  
Vol 41 (1) ◽  
pp. 17-24 ◽  
Author(s):  
L. Fuchs ◽  
L. Salce
Keyword(s):  
Valuation Domains ◽  
Torsion Modules

scholarly journals Pi-balanced torsion-free modules over a discrete valuation domain

2006 ◽  
Vol 295 (1) ◽  
pp. 269-288 ◽  
Author(s):  
David M. Arnold ◽  
K.M. Rangswamy ◽  
Fred Richman
Keyword(s):  
Valuation Domain ◽  
Discrete Valuation Domain ◽  
Free Modules ◽  
Torsion Free

On the Weak Global Dimension of Pseudovaluation Domains

1978 ◽  
Vol 21 (2) ◽  
pp. 159-164 ◽  
Author(s):  
David E. Dobbs
Keyword(s):  
Integral Domain ◽  
Global Dimension ◽  
Valuation Domain ◽  
Valuation Domains ◽  
Dimension 2 ◽  
The Ideal

In [7], Hedstrom and Houston introduce a type of quasilocal integral domain, therein dubbed a pseudo-valuation domain (for short, a PVD), which possesses many of the ideal-theoretic properties of valuation domains. For the reader′s convenience and reference purposes, Proposition 2.1 lists some of the ideal-theoretic characterizations of PVD′s given in [7]. As the terminology suggests, any valuation domain is a PVD. Since valuation domains may be characterized as the quasilocal domains of weak global dimension at most 1, a homological study of PVD's seems appropriate. This note initiates such a study by establishing (see Theorem 2.3) that the only possible weak global dimensions of a PVD are 0, 1, 2 and ∞. One upshot (Corollary 3.4) is that a coherent PVD cannot have weak global dimension 2: hence, none of the domains of weak global dimension 2 which appear in [10, Section 5.5] can be a PVD.

scholarly journals Algebraic entropy for valuation domains

2015 ◽  
Vol 3 (1) ◽  
Author(s):  
Paolo Zanardo
Keyword(s):  
Addition Theorem ◽  
Valuation Domain ◽  
Algebraic Entropy ◽  
Valuation Domains ◽  
Special Case

AbstractLet R be a non-discrete Archimedean valuation domain, G an R-module, Φ ∈ EndR(G).We compute the algebraic entropy entv(Φ), when Φ is restricted to a cyclic trajectory in G. We derive a special case of the Addition Theorem for entv, that is proved directly, without using the deep results and the difficult techniques of the paper by Salce and Virili [8].

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