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One way to obtain invariants of some Legendrian submanifolds in 1-jet spaces $J^1M$, equipped with the standard contact structure, is through the Morse theoretic technique of generating families. This paper extends the invariant of…

Symplectic Geometry · Mathematics 2018-02-16 Ziva Myer

We determine the automorphism groups of Koras-Russell threefolds of the second kind. In particular we show that these groups are semi-direct products of two subgroups, one given by the multiplicative group and the other isomorphic to a…

Algebraic Geometry · Mathematics 2015-07-23 Charlie Petitjean

This is a study of twisted K-theory on a product space $T \times M$. The twisting comes from a decomposable cup product class which applies the 1-cohomology of $T$ and the 2-cohomology of $M$. In the case of a topological product, we give a…

K-Theory and Homology · Mathematics 2014-05-29 Antti J. Harju

This paper is devoted to investigating the structure theory of a class of not-finitely graded Lie superalgebras related to generalized super-Virasoro algebras. In particular, we completely determine the derivation algebras, the automorphism…

Rings and Algebras · Mathematics 2016-07-19 Juanjuan Li , Guangzhe Fan

We introduce filtered cohomologies of differential forms on symplectic manifolds. They generalize and include the cohomologies discussed in Paper I and II as a subset. The filtered cohomologies are finite-dimensional and can be associated…

Symplectic Geometry · Mathematics 2014-05-06 Chung-Jun Tsai , Li-Sheng Tseng , Shing-Tung Yau

We consider a pairing producing various cyclic Hochschild cocycles, which led Alain Connes to cyclic cohomology. We are interested in geometrical meaning and homological properties of this pairing. We define a non-trivial pairing between…

K-Theory and Homology · Mathematics 2009-11-11 Tomasz Maszczyk

A new framework for studying superspace is given, based on methods from Clifford analysis. This leads to the introduction of both orthogonal and symplectic Clifford algebra generators, allowing for an easy and canonical introduction of a…

High Energy Physics - Theory · Physics 2007-07-20 Hendrik De Bie , Frank Sommen

There are different notions of homology and cohomology that can be defined for a group with an action of another group by group automorphisms. In this paper we address three natural questions that arise in this context. Namely, the relation…

K-Theory and Homology · Mathematics 2020-07-14 Carlos Aquino , Rolando Jimenez , Martin Mijangos , Quitzeh Morales Meléndez

We construct an iterative method for factorising small strict n-categories into a unique (up to isomorphism) collection of small 1- categories. Following this we develop the theory to include a large class of $\infty$-categories. We use…

Category Theory · Mathematics 2014-06-11 Scott Balchin

We prove a homotopy invariance result for the first cohomology group of the special unitary group $\mathrm{SU}_3(F[t])$ with coefficients in irreducible representations of $\mathrm{PGL}_2(F)$. The main theorem establishes that this…

K-Theory and Homology · Mathematics 2026-04-07 Claudio Bravo

We show how to use Clifford algebra techniques to describe the de Rham cohomology ring of equal rank compact symmetric spaces $G/K$. In particular, for $G/K=U(n)/U(k)\times U(n-k)$, we obtain a new way of multiplying Schur polynomials,…

Representation Theory · Mathematics 2024-11-19 Kieran Calvert , Karmen Grizelj , Andrey Krutov , Pavle Pandžić

We consider K3 surfaces of Picard rank 14 which admit a purely nonsymplectic automorphism of order 16. The automorphism acts on the second cohomology group with integer coefficients and we compute the invariant sublattice for the action. We…

Algebraic Geometry · Mathematics 2021-03-04 Paola Comparin , Nathan Priddis , Alessandra Sarti

Let $\Omega$ be a tiling space and let $G$ be the maximal group of rotations which fixes $\Omega$. Then the cohomology of $\Omega$ and $\Omega/G$ are both invariants which give useful geometric information about the tilings in $\Omega$. The…

Operator Algebras · Mathematics 2015-06-17 Charles Starling

We develop a systematic algorithm for constructing an N-fold supersymmetric system from a given vector space invariant under one of the supercharges. Applying this algorithm to spaces of monomials, we construct a new multi-parameter family…

High Energy Physics - Theory · Physics 2007-05-23 Artemio Gonzalez-Lopez , Toshiaki Tanaka

This is the third of a series of papers on a new equivariant cohomology that takes values in a vertex algebra, and contains and generalizes the classical equivariant cohomology of a manifold with a Lie group action a la H. Cartan. In this…

Differential Geometry · Mathematics 2021-05-21 Bong H. Lian , Andrew R. Linshaw , Bailin Song

There exist spaces BSol(q) which are the classifying spaces of a family of 2-local finite groups based on certain fusion system over the Sylow 2-subgroups of Spin_7(q). In this paper we calculate the cohomology of BSol(q) as an algebra over…

Algebraic Topology · Mathematics 2007-05-23 Jelena Grbic

We give a combinatorial description (including explicit differential-form bases) for the cohomology groups of the space of n distinct nonzero complex numbers, with coefficients in rank-one local systems which are of finite monodromy around…

Representation Theory · Mathematics 2007-05-23 Anthony Henderson

We study the non-abelian Hopf cohomology theory of Radford products with coefficients in a comodule algebra. We show that these sets can be expressed in terms of the non-abelian Hopf cohomology theory of each factor of the Radford product.…

K-Theory and Homology · Mathematics 2009-05-06 P. Nuss , M. Wambst

The quotient cohomology of tiling spaces is a topological invariant that relates a tiling space to one of its factors, viewed as topological dynamical systems. In particular, it is a relative version of the tiling cohomology that…

Algebraic Topology · Mathematics 2023-07-19 Enrico Paolo Bugarin , Franz Gähler

We define a cotriple (co)homology of crossed modules with coefficients in a $\pi_1$-module. We prove its general properties, including the connection with the existing cotriple theories on crossed modules. We establish the relationship with…

Algebraic Topology · Mathematics 2007-05-23 Simona Paoli