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We study the properties of the multiplicative structure on valuations on convex sets. We prove a new version of the hard Lefschetz theorem for even translation invariant continuous valuations, and discuss related problems of integral…

Metric Geometry · Mathematics 2007-05-23 Semyon Alesker

We prove Sklar's theorem in infinite dimensions via a topological argument and the notion of inverse systems.

Probability · Mathematics 2021-01-22 Fred Espen Benth , Giulia Di Nunno , Dennis Schroers

We establish various extensions of the convexity Dines theorem for a (joint-range) pair of inhomogeneous quadratic functions. If convexity fails we describe those rays for which the sum of the joint-range and the ray is convex. These…

Optimization and Control · Mathematics 2015-08-10 Fabián Flores-Bazán , Felipe Opazo

It is proved that the continuum hypothesis implies the existence of a group M containing a nonalgebraic unconditionally closed set, i.e., a set which is closed in any Hausdorff group topology on M but is not an intersection of finite unions…

Group Theory · Mathematics 2007-05-23 Ol'ga V. Sipacheva

We deal with the problem of preserving various versions of completeness in (< kappa) --support iterations of forcing notions, generalizing the case ``S --complete proper is preserved by CS iterations for a stationary co-stationary S…

Logic · Mathematics 2016-09-07 Saharon Shelah

We prove a duality theorem for Cohen--Macaulay simplicial complexes. This is a generalisation of Poincar\'e Duality, framed in the language of combinatorial sheaves. Our treatment is self-contained and accessible for readers with a working…

Algebraic Topology · Mathematics 2025-02-07 Richard D. Wade , Thomas A. Wasserman

In this paper, we study the weighted difference substitutions from geometrical views. First, we give the geometric meanings of the weighted difference substitutions, and introduce the concept of convergence of the sequence of substitution…

Symbolic Computation · Computer Science 2009-12-30 Xiaorong Hou , Song Xu , Junwei Shao

We resolve Stillman's conjecture for families of polynomial rings that are graded by any semigroup under mild conditions. Conversely, we show that these conditions are necessary for the existence of a Stillman bound. This has applications…

Commutative Algebra · Mathematics 2025-04-15 John Cobb , Nathaniel Gallup , John Spoerl

Equivariant Riemann-Roch theorem for the complex variety under the action of complex linear reductive algebraic group.

Algebraic Geometry · Mathematics 2007-05-23 Bin Zhang

In this article, we study the unconditional uniqueness of $\dot H^s$, $0<s< 1$, solutions for the nonlinear Schr\"odinger equation $i\partial_t u +\Delta u+ c |u|^\alpha u=0$ in ${\mathbb R}^n$. We give a unified proof of the previously…

Analysis of PDEs · Mathematics 2012-03-19 Zheng Han , Daoyuan Fang

We establish a version of the complex Frobenius theorem in the context of a complex subbundle S of the complexified tangent bundle of a manifold, having minimal regularity. If the subbundle S defines the structure of a Levi-flat…

Differential Geometry · Mathematics 2007-11-08 C. Denson Hill , Michael Taylor

We prove that the strong polarized relation for the continuum holds for $\aleph_0$ and for every supercompact cardinal. We use iteration of Mathias forcing.

Logic · Mathematics 2012-06-13 Shimon Garti , Saharon Shelah

In this paper, we establish some new Hadamard type inequalities for s-logarithmically convex functions in the second sense via fractional integrals by using Lemma 1 which has been proved by Sarikaya et al. in the paper [3].

Functional Analysis · Mathematics 2012-12-10 Havva Kavurmaci , Mevlut Tunc

Let $M$ be a compact abstract $CR$ manifold of arbitrary $CR$ codimension. Under certain conditions on the Levi form we prove the infinite dimensionality of some global cohomology groups of $M$.

Complex Variables · Mathematics 2018-07-25 Judith Brinkschulte , C. Denson Hill

We prove non local Hardy inequalities on Carnot groups and Riemannian manifolds, relying on integral representations of fractional Sobolev norms.

Functional Analysis · Mathematics 2010-04-08 Emmanuel Russ , Yannick Sire

We prove non local Hardy inequalities on Carnot groups and Riemannian manifolds, relying on integral representations of fractional Sobolev norms.

Functional Analysis · Mathematics 2010-03-22 Emmanuel Russ , Yannick Sire

On a convex bounded open set, we prove that Poincar\'e-Sobolev constants for functions vanishing at the boundary can be bounded from below in terms of the norm of the distance function in a suitable Lebesgue space. This generalizes a result…

Optimization and Control · Mathematics 2023-07-13 Francesca Prinari , Anna Chiara Zagati

Considering the sets of subsums of series (or achievement sets) we show that for conditionally convergent series the multidimensional case is much more complicated than that of the real line. Although we are far from the full topological…

Functional Analysis · Mathematics 2016-04-27 Artur Bartoszewicz , Szymon Głab , Jacek Marchwicki

In this paper, we prove that all finite solvable groups satisfy the Isaacs-Seitz conjecture namely the derived lenght of a finite solvable group G is less than or equal to the number of distinct irreducible complex character degrees of G.

Group Theory · Mathematics 2017-05-30 Burcu Çınarcı , Temha Erkoç

A set of sequences is said to converge simultaneously if there exists an infinite subset $H$ of the index set $\omega$ such that all sequences converge when restricted to $H$. We discuss simultaneous convergence of sequences in the same or…

General Topology · Mathematics 2025-12-18 Sirio Resteghini , Cesare Straffelini
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