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Related papers: A short note on containment of cores

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Quantum Physics · Physics 2007-05-23 Prashant

We exhibit a theory where definable types lack the amalgamation property.

Logic · Mathematics 2025-03-14 Martin Hils , Rosario Mennuni

In their recent paper on posets with a pseudocomplementation denoted by * the first and the third author introduced the concept of a *-ideal. This concept is in fact an extension of a similar concept introduced in distributive…

Rings and Algebras · Mathematics 2022-08-03 Ivan Chajda , Miroslav Kolařík , Helmut Länger

We investigate non-wellfounded proof systems based on parsimonious logic, a weaker variant of linear logic where the exponential modality ! is interpreted as a constructor for streams over finite data. Logical consistency is maintained at a…

Logic in Computer Science · Computer Science 2025-09-03 Matteo Acclavio , Gianluca Curzi , Giulio Guerrieri

Let $I_A$ be a toric ideal. We prove that the degrees of the elements of the Graver basis of $I_A$ are not polynomially bounded by the true degrees of the circuits of $I_A$.

Commutative Algebra · Mathematics 2018-10-30 Christos Tatakis , Apostolos Thoma

This paper had been withdrawn because the prime reported effect had not been confirmed in further investigations (see arXiv:0812.4488 [hep-lat]).

High Energy Physics - Lattice · Physics 2008-12-24 P. Yu. Boyko , F. V. Gubarev , S. M. Morozov

We first show a counter intuitive result that in the ring of real valued continuous functions on $[0,1]$ non maximal prime ideals exist. This is a standard proof and a well known result. Interestingly, a non maximal prime ideal in this ring…

Rings and Algebras · Mathematics 2016-04-12 Vaibhav Pandey

We combine dynamical and non-equilibrium chemical modeling of evolving prestellar molecular cloud cores, and explore the evolution of molecular abundances in the contracting core. We model both magnetic cores, with varying degrees of…

Astrophysics of Galaxies · Physics 2015-06-03 Konstantinos Tassis , Karen Willacy , Harold W. Yorke , Neal J. Turner

This is a short note with some (very elementary) remarks concerning realization theory and the choice of inputs for identifying systems. Its goal is to bring some of these facts to the attention of the systems biology community.

Optimization and Control · Mathematics 2007-05-23 Eduardo D. Sontag

In a recent work, Kaiser, Stehl\'ik and \v{S}krekovski provide a family of critically 3-chromatic graphs whose expansions do not result in critically 4-chromatic graphs, and thus give counterexamples to a conjecture of Francisco, Ha and Van…

Commutative Algebra · Mathematics 2014-09-08 Huy Tai Ha , Mengyao Sun

Normal ideals on regular uncountable cardinals are familiar objects. We investigate ideals that are pleasant--while a normal ideal is closed under arbitrary diagonal unions, a pleasant ideal is closed only under diagonal unions indexed by…

Logic · Mathematics 2009-09-25 Christopher Leary

The ancillary file Corrigendum.pdf contains an explanation why our proof does not work.

Discrete Mathematics · Computer Science 2019-09-16 Volker Kaibel , Jon Lee , Matthias Walter , Stefan Weltge

We present an observational and theoretical study of the ionization fraction in several massive cores located in regions that are currently forming stellar clusters. Maps of the emission from the J = 1-> O transitions of C18O, DCO+, N2H+,…

Astrophysics · Physics 2009-10-30 Edwin A. Bergin , Rene Plume , Jonathan P. Williams , Philip C. Myers

In this note it is proven that an idempotent ring cannot be Morita equivalent to its idempotent proper ideal.

Rings and Algebras · Mathematics 2025-11-25 Kristo Väljako

We have found that the minimum energy configuration of $N=395$ charges confined in a disk and interacting via the Coulomb potential, reported by Cerkaski et al. in Ref.~\cite{Cerkaski15} is not a global minimum of the total electrostatic…

Computational Physics · Physics 2017-03-08 Paolo Amore

This paper has been withdrawn due to a crucial error in the proof of the main theorem

Algebraic Geometry · Mathematics 2007-05-23 Eriko Hironaka

We show that for a wildly ramified torus, depth is not preserved in general under local Langlands correspondence for tori.

Representation Theory · Mathematics 2021-06-18 Manish Mishra , Basudev Pattanayak

The title theorem is proved by example: an algebra of binary relations, closed under intersection and composition, that is not isomorphic to any such algebra on a finite set.

Logic · Mathematics 2016-04-06 Roger D. Maddux

Elimination of quantifiers is shown to fail dramatically for a group of well-known mathematical theories (classically enjoying the property) against a wide range of relevant logical backgrounds. Furthermore, it is suggested that only by…

Logic · Mathematics 2018-09-25 Guillermo Badia , Andrew Tedder

We consider the ideal of inner $2$-minors $I_{\mathcal{P}}$ of a finite set of cells $\mathcal{P}$, which we call the cell ideal of $\mathcal{P}$. A nice interpretation for the height of an unmixed ideal $I_{\mathcal{P}}$, in terms of the…

Commutative Algebra · Mathematics 2024-06-11 Jürgen Herzog , Takayuki Hibi , Somayeh Moradi