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This brief note concerns the invertibility of certain alternant matrices. In particular those that consisting of polynomials and products of polynomials and logarithms are shown to be invertible under appropriate conditions on the degrees…

Classical Analysis and ODEs · Mathematics 2021-08-26 Jeff Ledford

We extend the holomorphic analytic torsion classes of Bismut and K\"ohler to arbitrary projective morphisms between smooth algebraic complex varieties. To this end, we propose an axiomatic definition and give a classification of the…

Differential Geometry · Mathematics 2011-02-14 J. I. Burgos Gil , G. Freixas i Montplet , R. Litcanu

We begin this note with a von Neumann algebraic version of the elementary but extremely useful fact about being able to extend inner-product preserving maps from a total set of the domain Hilbert space to an isometry defined on the entire…

Operator Algebras · Mathematics 2013-10-14 Panchugopal Bikram , Masaki Izumi , R. Srinivasan , V. S. Sunder

We consider non-Hermitian but PT-symmetric extensions of Calogero models, which have been proposed by Basu-Mallick and Kundu for two types of Lie algebras. We address the question of whether these extensions are meaningful for all remaining…

High Energy Physics - Theory · Physics 2010-11-05 Andreas Fring

We propose a formally completely integrable extension of heat hierarchy based on the space of symmetries isomorphic to the Weyl algebra $\mathcal{A}_1$. The extended heat hierarchy will be the basic model for the analysis of the extension…

Differential Geometry · Mathematics 2017-08-15 Joe S. Wang

We review the construction of generalized integrable hierarchies of partial differential equations, associated to affine Kac-Moody algebras, that include those considered by Drinfel'd and Sokolov. These hierarchies can be used to construct…

High Energy Physics - Theory · Physics 2016-01-27 T. Hollowood , J. L. Miramontes , J. Sanchez Guillen

Let $R$ be a ring with unity, $\sigma$ an endomorphism of $R$ and $M_R$ a right $R$-module. In this paper, we continue studding $\sigma$-rigid modules that were introduced by Gunner et al. \cite{generalized/rigid}. We give some results on…

Rings and Algebras · Mathematics 2023-02-07 Mohamed Louzari , Armando Reyes

We give some extensions of Mercer's theorem to continuous Carleman kernels inducing unbounded integral operators.

Functional Analysis · Mathematics 2007-05-23 I. M. Novitskii , M. A. Romanov

We establish isomorphism ranges for the comparison maps between algebraic and topological K-groups, extending classical Quillen-Lichtenbaum conjecture to separated complex schemes of finite type after refinement. Additionally, we…

Algebraic Geometry · Mathematics 2026-05-01 Chunhui Wei

Geometric structures underlying commutative and non commutative integrable dynamics are analyzed. They lead to a new characterization of noncommutative integrability in terms of spectral properties and of Nijenhuis torsion of an invariant…

Exactly Solvable and Integrable Systems · Physics 2007-05-23 G. Sparano , G. Vilasi

We investigate a notion of inverse for neutrices inspired by Van den Berg and Koudjeti's decomposition of a neutrix as the product of a real number and an idempotent neutrix. We end up with an algebraic structure that can be characterized…

Logic · Mathematics 2023-09-06 Bruno Dinis , Emanuele Bottazzi

We prove a complex polynomial plank covering theorem for not necessarily homogeneous polynomials. As the consequence of this result, we extend the complex plank theorem of Ball to the case of planks that are not necessarily centrally…

Metric Geometry · Mathematics 2024-05-28 Alexey Glazyrin , Roman Karasev , Alexandr Polyanskii

We prove a hom-associative version of Hilbert's basis theorem, which includes as special cases both a non-associative version and the classical associative Hilbert's basis theorem for Ore extensions. Along the way, we develop hom-module…

Rings and Algebras · Mathematics 2025-07-16 Per Bäck , Johan Richter

Utilizing our recent proximal-average based results on the constructive extension of monotone operators, we provide a novel approach to the celebrated Kirszbraun-Valentine Theorem and to the extension of firmly nonexpansive mappings.

Functional Analysis · Mathematics 2008-07-09 Heinz H. Bauschke , Xianfu Wang

We consider the extension of the Heisenberg vertex operator algebra by all its irreducible modules. We give an elementary construction for the intertwining vertex operators and show that they satisfy a complex parametrized generalized…

Quantum Algebra · Mathematics 2012-11-08 Michael P. Tuite , Alexander Zuevsky

Electronic structure methods that exploit nonorthogonal Slater determinants face the challenge of efficiently computing nonorthogonal matrix elements. In a recent publication, H. G. A. Burton, J. Chem. Phys. 154, 144109 (2021), I introduced…

Chemical Physics · Physics 2024-06-19 Hugh G. A. Burton

We review and give detailed description for ${\rm gl}_{NM}$ Gaudin models related to holomorphic vector bundles of rank $NM$ and degree $N$ over elliptic curve with $n$ punctures. Then we introduce their generalizations constructed by means…

Mathematical Physics · Physics 2021-10-22 E. Trunina , A. Zotov

This paper is a brief overview of some of our recent results in collaboration with other authors. The cocycle invariants of classical knots and knotted surfaces are summarized, and some applications are presented.

Geometric Topology · Mathematics 2007-05-23 J. Scott Carter , Masahico Saito

In this paper, we give a complete self-contained proof that the rigidity matrix of a symmetric bar and joint framework (as well as its transpose) can be transformed into a block-diagonalized form using techniques from group representation…

Metric Geometry · Mathematics 2009-06-19 Bernd Schulze

We construct a new polynomial invariant of maps (graphs embedded in a compact surface, orientable or non-orientable), which contains as specializations the Krushkal polynomial, the Bollob\'as--Riordan polynomial, the Las Vergnas polynomial,…

Combinatorics · Mathematics 2018-04-05 Andrew Goodall , Bart Litjens , Guus Regts , Lluís Vena