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Heckenberger introduced the Weyl groupoid of a finite-dimensional Nichols algebra of diagonal type. We replace the matrix of its braiding by a higher tensor and present a construction which yields further Weyl groupoids. Abelian cohomology…

Quantum Algebra · Mathematics 2023-04-07 Michael Cuntz , Tobias Ohrmann

We study the elliptic genera of level $N$ at the cusps of $\Gamma_1(N)$ for any complete intersection. These genera are described as the summations of generalized binomial coefficients, where each generalized binomial coefficient is related…

Algebraic Topology · Mathematics 2023-11-14 Jianbo Wang , Yuyu Wang , Zhiwang Yu

We study the category of Sp-equivariant modules over the infinite variable polynomial ring, where Sp denotes the infinite symplectic group. We establish a number of results about this category: for instance, we show that every finitely…

Commutative Algebra · Mathematics 2022-03-15 Steven V Sam , Andrew Snowden

The present paper is a continuation of [13], [14] of the authors. Specifically, the paper considers the MD5-foliations associated to connected and simply connected MD5-groups such that their Lie algebras have 4-dimensional commutative…

Differential Geometry · Mathematics 2015-05-13 Le Anh Vu , Duong Quang Hoa

We prove that Kellendonk's $C^*$-algebra of an aperiodic and repetitive tiling with finite local complexity is classifiable by the Elliott invariant. Our result follows from showing that tiling $C^*$-algebras are $\mathcal{Z}$-stable, and…

Operator Algebras · Mathematics 2019-09-11 Luke J. Ito , Michael F. Whittaker , Joachim Zacharias

Let $Y$ be a cubic threefold with a non-Eckardt type involution $\tau$. Our first main result is that the $\tau$-equivariant category of the Kuznetsov component $\mathcal{K}u_{\mathbb{Z}_2}(Y)$ determines the isomorphism class of $Y$ for…

Algebraic Geometry · Mathematics 2024-10-22 Sebastian Casalaina-Martin , Xianyu Hu , Xun Lin , Shizhuo Zhang , Zheng Zhang

Isomorphy classes of k-involutions have been studied for their correspondence with generalized symmetric spaces of algebraic groups. This is a continuation of papers written by A.G. Helminck and collaborators that are regarding algebraic…

Group Theory · Mathematics 2016-01-05 John Hutchens

We construct a geometric model for the mapping class group M of a non-exceptional oriented surface of finite type and use it to show that the action of M on the compact Hausdorff space of complete geodesic laminations is topologically…

Group Theory · Mathematics 2008-03-19 Ursula Hamenstaedt

In this paper, we prove the Novikov conjecture for a class of highly non-linear groups, namely discrete subgroups of the diffeomorphism group of a compact smooth manifold. This removes the volume-preserving condition in a previous work.…

K-Theory and Homology · Mathematics 2025-02-24 Sherry Gong , Jianchao Wu , Zhizhang Xie , Guoliang Yu

The rigidity theorem of Witten-Bott-Taubes-Hirzebruch tells us that, if the circle group acts on a closed almost complex (or more generally unitary) manifold whose first Chern class is divisible by a positive integer N greater than 1, then…

Symplectic Geometry · Mathematics 2007-05-23 Akio Hattori , Mikiya Masuda

In this work, we identify a certain family of higher-dimensional formal groups over the ring of $p$-adic integers such that any two formal groups in that class coincide if they share infinitely many torsion points. As a useful application,…

Number Theory · Mathematics 2025-01-20 Mabud Ali Sarkar , Absos Ali Shaikh

We classify pointed Hopf algebras with finite Gelfand-Kirillov dimension whose infinitesimal braiding has dimension 2 but is not of diagonal type, or equivalently is a block. These Hopf algebras are new and turn out to be liftings of either…

Quantum Algebra · Mathematics 2016-06-13 Nicolás Andruskiewitsch , Iván Angiono , István Heckenberger

For $g \ge 5$, we give a complete classification of the connected components of strata of abelian differentials over Teichm\"uller space, establishing an analogue of Kontsevich and Zorich's classification of their components over moduli…

Geometric Topology · Mathematics 2021-06-30 Aaron Calderon , Nick Salter

We consider algebraic varieties canonically associated to any Lie superalgebra, and study them in detail for super-Poincar\'e algebras of physical interest. They are the locus of nilpotent elements in (the projectivized parity reversal of)…

High Energy Physics - Theory · Physics 2018-07-11 Richard Eager , Ingmar Saberi , Johannes Walcher

We compute characteristic numbers of elliptically fibered fourfolds with multisections or non-trivial Mordell-Weil groups. We first consider the models of type E$_{9-d}$ with $d=1,2,3,4$ whose generic fibers are normal elliptic curves of…

High Energy Physics - Theory · Physics 2018-08-23 Mboyo Esole , Monica Jinwoo Kang

We provide explicit bounds on the difference of heights of the $j$-invariants of isogenous elliptic curves defined over $\overline{\mathbb{Q}}$. The first one is reminiscent of a classical estimate for the Faltings height of isogenous…

Number Theory · Mathematics 2019-02-28 Fabien Pazuki

Our primary aim is to develop a theory of equivariant genera for stably complex manifolds equipped with compatible actions of a torus T^k. In the case of omnioriented quasitoric manifolds, we present computations that depend only on their…

Algebraic Topology · Mathematics 2010-10-22 Victor M. Buchstaber , Taras E. Panov , Nigel Ray

In an enriched setting, we show that higher groupoids and higher categories form categories of fibrant objects. The nerve of a differential graded algebra is a higher category in the category of algebraic varieties, where covers are defined…

Algebraic Geometry · Mathematics 2018-01-16 Kai Behrend , Ezra Getzler

We show that equivariant elliptic genera of toric Calabi-Yau 3-folds are generalized weak Jacobi forms. We also introduce a notion of averaged equivariant elliptic genera of toric Calabi-Yau 3-folds, and show that they are ordinary weak…

Algebraic Geometry · Mathematics 2015-10-30 Jian Zhou

We construct a new class of symmetric algebras of tame representation type that are also the endomorphism algebras of cluster tilting objects in 2-Calabi-Yau triangulated categories, hence all their non-projective indecomposable modules are…

Representation Theory · Mathematics 2019-03-12 Sefi Ladkani