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We characterize, in a purely algebraic manner, certain linear forms, called stable, on a Lie algebra. As an application, we determine the index of a Borel subalgebra of a semi-simple Lie algebra. Finally, we give an example of a parabolic…

Representation Theory · Mathematics 2007-05-23 Patrice Tauvel , Rupert W. T. Yu

In this review article, first we give the concrete formulas of representations and cohomologies of associative algebras, Lie algebras, pre-Lie algebras, Leibniz algebras and 3-Lie algebras and some of their strong homotopy analogues. Then…

Rings and Algebras · Mathematics 2021-01-25 Ai Guan , Andrey Lazarev , Yunhe Sheng , Rong Tang

In this paper we construct full support character sheaves for stably graded Lie algebras. Conjecturally these are precisely the cuspidal character sheaves. Irreducible representations of Hecke algebras associated to complex reflection…

Representation Theory · Mathematics 2025-03-25 Kari Vilonen , Ting Xue

Using the language of twisted skew-commutative algebras, we define \emph{secondary representation stability}, a stability pattern in the {\it unstable} homology of spaces that are representation stable in the sense of Church, Ellenberg, and…

Algebraic Topology · Mathematics 2019-10-23 Jeremy Miller , Jennifer C. H. Wilson

Survey article on representation stability and examples in algebraic geometry and topology, written for the Notices of the AMS.

Commutative Algebra · Mathematics 2019-12-25 Steven V Sam

We describe an inner product on the diagrams on which the Temperley-Lieb algebra can be represented. We exhibit several constructions which are in natural combinatorial bijection with these diagrams, which are generalizations of various…

Combinatorics · Mathematics 2015-03-17 C. Emily I. Redelmeier

We develop dualities for complete perfect distributive quasi relation algebras and complete perfect distributive involutive FL-algebras. The duals are partially ordered frames with additional structure. These frames are analogous to the…

Logic in Computer Science · Computer Science 2026-01-30 Andrew Craig , Peter Jipsen , Claudette Robinson

We show how the treatment of cellularity in families of algebras arising from diagram calculi, such as Jones' Temperley--Lieb wreaths, variants on Brauer's centralizer algebras, and the contour algebras of Cox et al (of which many algebras…

Rings and Algebras · Mathematics 2007-05-23 R. M. Green , P. P. Martin

We define a commuting family of operators $T_0,T_1,...,T_n$ in the Temperley--Lieb algebra $\mathcal{A}_n(x)$ of type $A_{n-1}$. Using an appropriate analogue to Murphy basis of the Iwahori--Hecke algebra of the symmetric group, we describe…

Representation Theory · Mathematics 2007-10-18 John Enyang

The faithfulness of the orthogonal group case of Brauer's representation of the Brauer centralizer algebras restricted to their Temperley-Lieb subalgebras, which was established by Vaughan Jones, is here proved in a new, elementary and…

Geometric Topology · Mathematics 2007-05-23 K. Dosen , Z. Kovijanic , Z. Petric

From a root system, one may consider the arrangement of reflecting hyperplanes, as well as its toric and elliptic analogues. The corresponding Weyl group acts on the complement of the arrangement and hence on its cohomology. We consider a…

Combinatorics · Mathematics 2021-01-26 Christin Bibby

For groups of prime order, equivariant stable maps between equivariant representation spheres are investigated using the Borel cohomology Adams spectral sequence. Features of the equivariant stable homotopy category, such as stability and…

Algebraic Topology · Mathematics 2011-10-12 Markus Szymik

The Temperley-Lieb and Brauer algebras and their cyclotomic analogues, as well as the partition algebra, are all examples of twisted semigroup algebras. We prove a general theorem about the cellularity of twisted semigroup algebras of…

Rings and Algebras · Mathematics 2010-10-08 Stewart Wilcox

We define a new category analogous to ${\bf FI}$ for the $0$-Hecke algebra $H_n(0)$ called the $0$-Hecke category, $\mathcal{H}$, indexing sequences of representations of $H_n(0)$ as $n$ varies under suitable compatibility conditions. We…

Representation Theory · Mathematics 2021-09-30 Robert P. Laudone

We give simple and unified proofs of the known stability and rigidity results for Lie algebras, Lie subalgebras and Lie algebra homomorphisms. Moreover, we investigate when a Lie algebra homomorphism is stable under all automorphisms of the…

Representation Theory · Mathematics 2013-07-31 Marius Crainic , Florian Schaetz , Ivan Struchiner

In this paper, we study the topology of ordered Hurwitz space. These are moduli spaces of branched covers with a choice of ordering on the branched points. Answering a question of Ellenberg, we prove that the homology of ordered Hurwitz…

Algebraic Topology · Mathematics 2025-09-09 Zachary Himes , Jeremy Miller , Jennifer C. H. Wilson

This paper analyzes the representation theoretic stability, in the sense of Thomas Church and Benson Farb, of the rank-selected homology of the Boolean lattice and the partition lattice, proving sharp uniform representation stability bounds…

Combinatorics · Mathematics 2026-05-13 Patricia Hersh , Sheila Sundaram

In this paper we study families of representations of the outer automorphism groups indexed on a collection of finite groups $\mathcal{U}$. We encode this large amount of data into a convenient abelian category $\mathcal{A}\mathcal{U}$…

Representation Theory · Mathematics 2025-02-25 Luca Pol , Neil P. Strickland

Orthogonal projections in ${\mathbb C}^n \otimes {\mathbb C}^n$ of rank one and rank two that give rise to unitary tensor space representations of the Temperley-Lieb algebra $TL_N(Q)$ are considered. In the rank one case, a complete…

Mathematical Physics · Physics 2015-10-20 Andrei Bytsko

We determine the representations of the Yokonuma-Temperley-Lieb algebra, which is defined as a quotient of the Yokonuma-Hecke algebra by generalising the construction of the classical Temperley-Lieb algebra. We then deduce the dimension of…

Representation Theory · Mathematics 2014-09-16 Maria Chlouveraki , Guillaume Pouchin