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We present a definition of a (super)-modular functor which includes certain interesting cases that previous definitions do not allow. We also introduce a notion of topological twisting of a modular functor, and construct formally a…

K-Theory and Homology · Mathematics 2018-01-09 Igor Kriz , Luhang Lai

We compare closed and rigid monoidal categories. Closedness is defined by the tensor product having a right adjoint: the internal hom functor. Rigidity, on the other hand, generalises the duality of finite-dimensional vector spaces. In the…

Category Theory · Mathematics 2026-02-06 Sebastian Halbig , Tony Zorman

This research aims to define Kac-Moody Lie algebra in Quaternion by using the concept of Quaternification of Lie algebra. The results of this research obtained the definition of Universal Kac-Moody Quaternion Lie algebra, Standard Kac-Moody…

Representation Theory · Mathematics 2024-10-02 Ferdi , Amir Kamal Amir , Andi Muhammad Anwar

We define the formal affine Demazure algebra and formal affine Hecke algebra associated to a Kac-Moody root system. We prove the structure theorems of these algebras, hence, extending several result and construction (presentation in terms…

Rings and Algebras · Mathematics 2017-04-03 Baptiste Calmès , Kirill Zainoulline , Changlong Zhong

This work introduces a general theory of universal pseudomorphisms and develops their connection to diagrammatic coherence. The main results give hypotheses under which pseudomorphism coherence is equivalent to the coherence theory of…

Category Theory · Mathematics 2025-07-02 Nick Gurski , Niles Johnson

This is a condensed write-up of a talk delivered at the Ramanujan International Symposium on Kac-Moody Lie algebras and Applications in Chennai in January 2002. The talk introduces special coideal subalgebras of quantum affine algebras…

Quantum Algebra · Mathematics 2007-05-23 Gustav W Delius

We discuss what it means for a symmetric monoidal category to be a module over a commutative semiring category. Each of the categories of (1) cartesian monoidal categories, (2) semiadditive categories, and (3) connective spectra can be…

Category Theory · Mathematics 2018-08-29 John D. Berman

Let $B$ be a bialgebra, and $A$ a left $B$-comodule algebra in a braided monoidal category $\Cc$, and assume that $A$ is also a coalgebra, with a not-necessarily associative or unital left $B$-action. Then we can define a right $A$-action…

Category Theory · Mathematics 2010-11-23 D. Bulacu , S. Caenepeel

We interpret and develop a theory of loop algebras as torsors (principal homogeneous spaces) over Laurent polynomial rings . As an application, we recover Kac's realization of affine Kac-Moody Lie algebras.

Representation Theory · Mathematics 2007-05-23 A. Pianzola

In this work, using the functoriality of Drinfeld center of fusion categories, we generalize an earlier result on the functoriality of full center of simple separable algebras in a fixed fusion category to all fusion categories. This…

Quantum Algebra · Mathematics 2021-03-03 Liang Kong , Wei Yuan , Hao Zheng

The aim of this work is to weaken the conditions of monogenity for functions that take values in one concrete three-dimensional commutative algebras over the field of complex numbers. The monogenity of the function understood as a…

Classical Analysis and ODEs · Mathematics 2020-06-24 M. V. Tkachuk , S. A. Plaksa

We show that induction along a Frobenius extension of Hopf algebras is a Frobenius monoidal functor in great generality, in particular, for all finite-dimensional and all pointed Hopf algebras. As an application, we show that induction…

Quantum Algebra · Mathematics 2026-05-01 Johannes Flake , Robert Laugwitz , Sebastian Posur

We define the spherical Hecke algebra for an (untwisted) affine Kac-Moody group over a local non-archimedian field. We prove a generalization of the Satake isomorphism for these algebras, relating it to integrable representations of the…

Representation Theory · Mathematics 2010-09-16 Alexander Braverman , David Kazhdan

Given a pseudomonad $\mathcal{T} $, we prove that a lax $\mathcal{T} $-morphism between pseudoalgebras is a $\mathcal{T} $-pseudomorphism if and only if there is a suitable (possibly non-canonical) invertible $\mathcal{T} $-transformation.…

Category Theory · Mathematics 2019-02-05 Fernando Lucatelli Nunes

Given a domain of characteristic zero $R$, we functorially construct a rigid symmetric monoidal stable $\infty$-category whose $K_0$ is $R$, solving a problem of Khovanov. We also functorially construct for any reduced commutative ring $R$…

K-Theory and Homology · Mathematics 2024-12-20 Ishan Levy

We prove that united K-theory is a surjective functor from the category of real simple purely infinite C*-algebras to the cateogry of countable acyclic CRT-modules.

Operator Algebras · Mathematics 2007-05-23 Jeffrey L. Boersema

In category theory, monads, which are monoid objects on endofunctors, play a central role closely related to adjunctions. Monads have been studied mostly in algebraic situations. In this dissertation, we study this concept in some…

Differential Geometry · Mathematics 2014-01-07 Benoît Jubin

Monoidal functors U:C --> M with left adjoints determine, in a universal way, monoids T in the category of oplax monoidal endofunctors on M. Such monads will be called bimonads. Treating bimonads as abstract "quantum groupoids" we derive…

Quantum Algebra · Mathematics 2007-05-23 K. Szlachanyi

We find automorphic form corrections which are generalized Lorentzian Kac--Moody superalgebras without odd real simple roots (see R. Borcherds \cite{Bo1} -- \cite{Bo7}, V. Kac \cite{Ka1} -- \cite{Ka3}, R. Moody \cite{Mo} and \S~6 of this…

alg-geom · Mathematics 2008-02-03 Valeri A. Gritsenko , Viacheslav V. Nikulin

We study the basic monoidal properties of the category of Hopf modules for a coquasi Hopf algebra. In particular we discuss the so called fundamental theorem that establishes a monoidal equivalence between the category of comodules and the…

Quantum Algebra · Mathematics 2008-01-09 Walter Ferrer Santos , Ignacio Lopez Franco
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