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After the work of Bloch and Srinivas on correspondences and algebraic cycles we begin the study of a birational class of algebraic varieties determined by the property that a multiple of the diagonal is rationally equivalent to a cycle…

alg-geom · Mathematics 2008-02-03 L. Barbieri-Viale

Rota-Baxter algebras and the closely related dendriform algebras have important physics applications, especially to renormalization of quantum field theory. Braided structures provide effective ways of quantization such as for quantum…

Quantum Algebra · Mathematics 2021-12-23 Li Guo , Yunnan Li

The aim of this paper is to construct a new braided $T$-category via the generalized Yetter-Drinfel'd modules and Drinfel'd codouble over Hopf algebra, an approach different from that proposed by Panaite and Staic \cite{PS}. Moreover, in…

Quantum Algebra · Mathematics 2017-02-14 Daowei Lu , Miman You

We compare two crossed homomorphisms on a braid group, one defined diagrammatically and the other defined algebraically. We show that these crossed homomorphisms are essentially the same, and compute them in detail for simple braids, namely…

Geometric Topology · Mathematics 2025-11-26 Yusuke Kuno , Yoshiro Yaguchi

In this paper, we introduce a notion of unistructural cluster algebras, for which the set of cluster variables uniquely determines the clusters. We prove that cluster algebras of Dynkin type and cluster algebras of rank 2 are unistructural,…

Representation Theory · Mathematics 2013-07-19 Ibrahim Assem , Ralf Schiffler , Vasilisa Shramchenko

We describe the Poisson ideals and attached symplectic geometry of a cluster algebra with compatible Poisson structure. We apply these results to determine the spectrum of a quantum cluster algebra. As an application, we describe the…

Quantum Algebra · Mathematics 2012-11-01 Sebastian Zwicknagl

Braided doubles provide a unifying framework for classical and quantum universal enveloping algebras and rational Cherednik algebras. They are a class of algebras with triangular decomposition, arising from a deformation problem, the…

Quantum Algebra · Mathematics 2011-11-24 Yuri Bazlov , Arkady Berenstein

We consider the problem of learning from a similarity matrix (such as spectral clustering and lowd imensional embedding), when computing pairwise similarities are costly, and only a limited number of entries can be observed. We provide a…

Machine Learning · Statistics 2014-06-11 Ethan Fetaya , Ohad Shamir , Shimon Ullman

We show that braided, sylleptic and symmetric monoidal bicategories are precisely the $\mathsf{E}_k$-monoids in the cartesian monoidal $(\infty,1)$-category of bicategories for respective integers $k$. To manage the underlying computations,…

Category Theory · Mathematics 2026-02-17 Raffael Stenzel

I show how to associate a Clifford algebra to a graph. I describe the structure of these Clifford graph algebras and provide many examples and pictures. I describe which graphs correspond to isomorphic Clifford algebras and also discuss…

Combinatorics · Mathematics 2013-06-25 Tanya Khovanova

We develop the theory of $\hbar$-vertex algebras, algebraic structures closely related to vertex algebras but with a deformed translation covariance axiom. We establish their structure theory, including analogues of Goddard's Uniqueness…

Quantum Algebra · Mathematics 2026-05-28 Simone Castellan

We describe an infinite family of non-Pl\"ucker cluster variables inside the double Bruhat cell cluster algebra defined by Berenstein, Fomin, and Zelevinsky. These cluster variables occur in a family of subalgebras of the double Bruhat cell…

Combinatorics · Mathematics 2021-07-23 Michael Chmutov , Pakawut Jiradilok , James Stevens

We study skew-symmetrizable cluster algebras $\mathcal{A}$ associated with unpunctured surfaces $\tilde{\mathbf{S}}$ endowed with an orientation-preserving involution $\sigma$. We give a geometric realization of such cluster algebras by…

Representation Theory · Mathematics 2026-01-16 Azzurra Ciliberti

We suggest two explicit descriptions of the Poisson q-W algebras which are Poisson algebras of regular functions on certain algebraic group analogues of the Slodowy transversal slices to adjoint orbits in a complex semisimple Lie algebra g.…

Quantum Algebra · Mathematics 2017-09-20 A. Sevostyanov

We study a moduli problem on a nodal curve of arithmetic genus 1, whose solution is an open subscheme in the zastava space for projective line. This moduli space is equipped with a natural Poisson structure, and we compute it in a natural…

Algebraic Geometry · Mathematics 2018-09-05 Michael Finkelberg , Alexander Kuznetsov , Leonid Rybnikov , Galyna Dobrovolska

Gridshells are defined as structures that have the shape and rigidity of a double curvature shell but consist of a grid instead of a continuous surface. This study concerns those obtained by elastic deformation of an initially flat two-way…

Other Computer Science · Computer Science 2015-03-24 Lina Bouhaya , Olivier Baverel , Jean-François Caron

Braided algebras are algebraic structures consisting of an algebra endowed with a Yang-Baxter operator, satisfying some compatibility conditions.Yang-Baxter Hochschild cohomology was introduced by the authors to classify infinitesimal…

Quantum Algebra · Mathematics 2025-02-25 Masahico Saito , Emanuele Zappala

We construct quadratic finite-dimensional Poisson algebras and their quantum versions related to rank N and degree one vector bundles over elliptic curves with n marked points. The algebras are parameterized by the moduli of curves. For N=2…

Exactly Solvable and Integrable Systems · Physics 2007-10-05 Yu. Chernyakov , A. M. Levin , M. Olshanetsky , A. Zotov

We study generalized density-based clustering in which sharply defined clusters such as clusters on lower-dimensional manifolds are allowed. We show that accurate clustering is possible even in high dimensions. We propose two data-based…

Statistics Theory · Mathematics 2010-11-11 Alessandro Rinaldo , Larry Wasserman

We describe two constructions giving rise to curved $A_{\infty}$-algebras. The first consists of deforming $A_{\infty}$-algebras, while the second involves transferring curved dg structures that are deformations of (ordinary) dg structures…

Differential Geometry · Mathematics 2016-02-23 Nikolay M. Nikolov , Svetoslav Zahariev
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