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In this short note, we prove some consequences of Burnside's vanishing property \cite{b-pa}. It is known that Harada's identity concerning the product of all conjugacy classes of a finite group is a consequence of Burnside's vanishing…

Quantum Algebra · Mathematics 2023-06-21 S. Burciu

We discuss the integrability of orthogonal almost complex structures on Riemannian products of even-dimensional round spheres and give a partial answer to the question raised by E. Calabi concerning the existence of complex structures on a…

Differential Geometry · Mathematics 2013-01-31 Yunhee Euh , Kouei Sekigawa

We show that any construction of cup-$i$ products on the normalized chains of simplicial sets is isomorphic -- not just homotopic -- to Steenrod's original construction if it is natural, minimal, non-degenerate, irreducible and free. We use…

Algebraic Topology · Mathematics 2022-02-16 Anibal M. Medina-Mardones

A generalization of Newton's identity on symmetric functions is given. Using the generalized Newton identity we give a unified method to show the existence of Hall-Littlewood, Jack and Macdonald polynomials. We also give a simple proof of…

Combinatorics · Mathematics 2014-04-22 Wuxing Cai , Naihuan Jing

Over a field of characteristic $0$ we give a concrete, computation--ready description of Jordan algebra structures and their low--order deformation theory. The Jordan identity is quartic in the elements and cubic in the multiplication, and…

Rings and Algebras · Mathematics 2026-02-10 Vincent E. Coll

Lie algebroids can not always be integrated into Lie groupoids. We introduce a new object--``Weinstein groupoid'', which is a differentiable stack with groupoid-like axioms. With it, we have solved the integration problem of Lie algebroids.…

Differential Geometry · Mathematics 2025-04-15 Chenchang Zhu

The Jacobi polynomials on the simplex are orthogonal polynomials with respect to the weight function $W_\bg(x) = x_1^{\g_1} ... x_d^{\g_d} (1- |x|)^{\g_{d+1}}$ when all $\g_i > -1$ and they are eigenfunctions of a second order partial…

Classical Analysis and ODEs · Mathematics 2011-11-15 Rabia Aktas , Yuan Xu

Identifiability, and the closely related idea of partial smoothness, unify classical active set methods and more general notions of solution structure. Diverse optimization algorithms generate iterates in discrete time that are eventually…

Optimization and Control · Mathematics 2024-06-24 Adrian Lewis , Tonghua Tian

In this paper we present our variant of quantum antisymmetry and quantum Jacobi identity.

q-alg · Mathematics 2008-02-03 Maxim Vybornov

We develop the theory of Hermitian Jacobi forms of lattice index, for both definite and indefinite Hermitian lattices. We also prove a theta decomposition theorem for vector-valued Jacobi forms (both in the orthogonal and Hermitian…

Number Theory · Mathematics 2023-10-26 Shaul Zemel

We show that the bigraded quasi-isomorphism type of the bigraded, bidifferential algebra of forms on a compact K\"ahler manifold generally contains more information than the de Rham cohomology algebra with its real Hodge structure. More…

Algebraic Topology · Mathematics 2024-04-16 Giovanni Placini , Jonas Stelzig , Leopold Zoller

Explicit formulas determining the dimension and the degree of the singular subscheme of hypersurfaces in ${\mathbb P}^n$ are given in terms of the graded Betti numbers of the minimal free resolution of the corresponding Jacobian algebra.…

Algebraic Geometry · Mathematics 2026-05-05 Alexandru Dimca , Gabriel Sticlaru

We prove that iterated Whitehead products of length (n+1) vanish in any value of an n-excisive functor in the sense of Goodwillie. We compare then different notions of homotopy nilpotency, from the Berstein-Ganea definition to the…

Algebraic Topology · Mathematics 2015-10-20 Jerome Scherer , Boris Chorny

We relate polyhedral products of topological spaces to graph products of groups. The loop homology algebras of polyhedral products are identified with the universal enveloping algebras of the Lie algebras associated with central series of…

Algebraic Topology · Mathematics 2025-01-17 Taras Panov , Temurbek Rahmatullaev

In the early 1980's the author proved G.W. Whitehead's conjecture about stable homotopy groups and symmetric products. In the mid 1990's, Arone and Mahowald showed that the Goodwillie tower of the identity had remarkably good properties…

Algebraic Topology · Mathematics 2017-05-17 Nicholas J. Kuhn

By starting with Durand's double integral representation for a product of two Jacobi functions of the second kind, we derive an integral representation for a product of two Jacobi functions of the second kind in kernel form. We also derive…

Classical Analysis and ODEs · Mathematics 2025-08-12 Howard S. Cohl , Loyal Durand

A fundamental idea in toric topology is that classes of manifolds with well-behaved torus actions (simply, toric spaces) are classified by pairs of simplicial complexes and (non-singular) characteristic maps. The authors in their previous…

Algebraic Topology · Mathematics 2019-08-15 Suyoung Choi , Hanchul Park

We give a new proof of an old identity of Dixon (1865-1936) that uses tools from topological combinatorics. Dixon's identity is re-established by constructing an infinite family of non-pure simplicial complexes $\Delta(n)$, indexed by the…

Combinatorics · Mathematics 2016-05-12 Ruth Davidson , Augustine O'Keefe , Daniel Parry

The work of Andrews and Merca on the truncated Euler's pentagonal number theorem led to a resurgence in research on truncated theta series identities. In particular, Yee proved a truncated version of the Jacobi Triple Product (JTP)…

Combinatorics · Mathematics 2024-01-09 Cristina Ballantine , Brooke Feigon

We study Whitehead products in the rational homotopy groups of a general component of a function space. For the component of any based map f: X \to Y, in either the based or free function space, our main results express the Whitehead…

Algebraic Topology · Mathematics 2008-12-11 Gregory Lupton , Samuel Bruce Smith