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In this article, we present a novel approach for parsing argumentation structures. We identify argument components using sequence labeling at the token level and apply a new joint model for detecting argumentation structures. The proposed…

Computation and Language · Computer Science 2016-07-25 Christian Stab , Iryna Gurevych

We prove an abstract Nyquist criterion in a general set up. As applications, we recover various versions of the Nyquist criterion, some of which are new.

Optimization and Control · Mathematics 2011-11-11 Amol Sasane

In the former article "Formal mathematical systems including a structural induction principle" we have presented a unified theory for formal mathematical systems including recursive systems closely related to formal grammars, including the…

Logic · Mathematics 2022-01-21 Matthias Kunik

The generalisation of the well-known (Hilbert polynomial) criterion for flatness of a projective morphism of Noetherian schemes is given for the case of nonreduced base of the morphism.

Algebraic Geometry · Mathematics 2012-09-28 Nadezda V. Timofeeva

Let $G$ be a finite group. In this short note, we give a criterion of nilpotency of $G$ based on the existence of elements of certain order in each section of $G$.

Group Theory · Mathematics 2018-02-13 Marius Tărnăuceanu

In this Note, we will characterize the Poisson structures compatible with the canonical metric of $\reel^3$. We will also give some relvant examples of such structures. The notion of compatibility used in this Note was introduced and…

Differential Geometry · Mathematics 2007-05-23 Mohamed Boucetta

This article introduces an iterative method for solving nonsingular non-Hermitian positive semidefinite systems of linear equations. To construct the iteration process, the coefficient matrix is split into two non-Hermitian positive…

Numerical Analysis · Mathematics 2025-03-05 Davod Khojasteh Salkuyeh , Mohsen Masoudi

We begin a systematic development of structure theory for a first order theory, which is stable over a monadic predicate. We show that stability over a predicate implies quantifier free definability of types over stable sets, introduce an…

Logic · Mathematics 2023-02-17 Saharon Shelah , Alexander Usvyatsov

In this paper, we identify some categorical structures in which one can model predicative formal systems: in other words, predicative analogues of the notion of a topos, with the aim of using sheaf models to interprete predicative formal…

Logic · Mathematics 2007-05-23 Benno van den Berg

Wedderburn's theorem on the structure of finite dimensional semisimple algebras is proved by using minimal prerequisites.

Rings and Algebras · Mathematics 2009-02-03 Matej Bresar

We introduce a combinatorial criterion for verifying whether a formula is not the conjunction of an equation and a co-equation. Using this, we give a proof for the nonequationality of the free group. Furthermore, we generalize the latter…

Logic · Mathematics 2023-03-08 Isabel Müller , Rizos Sklinos

For a linear non-Hermitian system, I demonstrate that a Hamiltonian can be constructed such that the non-Hermitian equations can be expressed exactly in the form of Hamilton's canonical equations. This is first shown for discrete systems…

Quantum Physics · Physics 2023-09-13 Qi Zhang

We introduce the notion of an ordered face structure. The ordered face structures to many-to-one computads are like positive face structures to positive-to-one computads. This allow us to give an explicit combinatorial description of…

Category Theory · Mathematics 2008-06-17 Marek Zawadowski

We show that the spaces of transfinite words, namely ordinal-indexed words, over a Noetherian space, is also Noetherian, under a natural topology which we call the regular subword topology. We characterize its sobrification and its…

General Topology · Mathematics 2023-03-24 Jean Goubault-Larrecq , Simon Halfon , Aliaume Lopez

Similar to a tree grammar, a Horn theory can be used to describe an infinite set of terms. In this paper, we present a class of Horn theories such that the set of definable predicates is closed wrt. conjunction and such that the…

Logic in Computer Science · Computer Science 2014-04-09 Jochen Burghardt

We propose axioms governing the interaction of constructive assertibility and meaningfulness predicates with a self-applicative truth predicate characterized by the T-scheme, and we prove the consistency of the resulting formal system.

Logic · Mathematics 2025-10-10 Nik Weaver

We give a criterion for the " almost independence " of a family of l-adic representations.

Algebraic Geometry · Mathematics 2010-06-15 Jean-Pierre Serre

We review the {\it Noether Symmetry Approach} as a geometric criterion to select theories of gravity. Specifically, we deal with Noether Symmetries to solve the field equations of given gravity theories. The method allows to find out exact…

General Relativity and Quantum Cosmology · Physics 2018-09-25 Konstantinos F. Dialektopoulos , Salvatore Capozziello

In this paper we develop in detail the geometric constructions that lead to many uniqueness results for the determination of polyhedral sets, typically scatterers, by a finite minimal number of measurements. We highlight how unique…

Analysis of PDEs · Mathematics 2023-10-10 Luca Rondi

Given a suitable Noetherian scheme, we classify tensor $t$-structures on the bounded derived category of coherent sheaves and its variants with prescribed support. Furthermore, we show that the existence of such $t$-structures restricting…

Algebraic Geometry · Mathematics 2026-05-19 Alexander Clark , Pat Lank , Kabeer Manali-Rahul , Chris J. Parker