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To classify the finite dimensional pointed Hopf algebras with Weyl group $G$ of $E_8$, we obtain the representatives of conjugacy classes of $G$ and all character tables of centralizers of these representatives by means of software GAP. In…

Quantum Algebra · Mathematics 2008-11-18 Shouchuan Zhang , Peng Wang , Jing Cheng , Hui Yang

To classify the finite dimensional pointed Hopf algebras with Weyl group $G$ of $E_8$, we obtain the representatives of conjugacy classes of $G$ and all character tables of centralizers of these representatives by means of software GAP. In…

Quantum Algebra · Mathematics 2008-11-18 Shouchuan Zhang , Peng Wang , Jing Cheng , Hui Yang

To classify the finite dimensional pointed Hopf algebras with Weyl group $G$ of $E_8$, we obtain the representatives of conjugacy classes of $G$ and all character tables of centralizers of these representatives by means of software GAP. In…

Quantum Algebra · Mathematics 2008-11-18 Shouchuan Zhang , Peng Wang , Jing Cheng , Hui Yang

To classify the finite dimensional pointed Hopf algebras with Weyl group $G$ of $E_8$, we obtain the representatives of conjugacy classes of $G$ and all character tables of centralizers of these representatives by means of software GAP. In…

Quantum Algebra · Mathematics 2008-11-18 Shouchuan Zhang , Peng Wang , Jing Cheng , Hui Yang

To classify the finite dimensional pointed Hopf algebras with Weyl group $G$ of $E_6$, $E_7$, $F_4$, $G_2$, we obtain the representatives of conjugacy classes of $G$ and all character tables of centralizers of these representatives by means…

Quantum Algebra · Mathematics 2008-11-18 Shouchuan Zhang , Peng Wang , Jing Cheng , Hui Yang

To classify the finite dimensional pointed Hopf algebras with $G= {\rm McL}$ we obtain the representatives of conjugacy classes of $G$ and all character tables of centralizers of these representatives by means of software {\rm GAP}.

Quantum Algebra · Mathematics 2009-09-03 Shouchuan Zhang , Jieqiong He , Guichao Wu

To classify the finite dimensional pointed Hopf algebras with $G= {\rm HS}$ or ${\rm Co3}$ we obtain the representatives of conjugacy classes of $G$ and all character tables of centralizers of these representatives by means of software {\rm…

Group Theory · Mathematics 2009-06-03 Shouchuan Zhang , Jing Cheng , Jieqiong He

For a Weyl group W, we give a simple closed formula (valid on elliptic conjugacy classes) for the character of the representation of W in each A-isotypic component of the full homology of a Springer fiber. We also give a formula (valid…

Representation Theory · Mathematics 2019-12-19 Dan Ciubotaru , Peter E. Trapa

All -1-type pointed Hopf algebras and central quantum linear spaces with Weyl groups of exceptional type are found. It is proved that every non -1-type pointed Hopf algebra with real $G(H)$ is infinite dimensional and every central quantum…

Quantum Algebra · Mathematics 2009-04-06 Shouchuan Zhang , Yao-Zhong Zhang , Peng Wang , Jing Cheng , Hui Yang

The purpose of this paper is to investigate the finite group which appears in the study of the Type II $\mathbf{Z}_4$-codes. To be precise, it is characterized in terms of generators and relations, and we determine the structure of the…

Representation Theory · Mathematics 2017-06-08 Masashi Kosuda , Manabu Oura

Using the \texttt{WeylModules} \textsf{GAP} Package, we compute structural information about certain Weyl modules for type $G_2$ in characteristic $2$. This gives counterexamples to two conjectures stated by S.~Donkin in 1990. It also…

Representation Theory · Mathematics 2025-09-11 Stephen Doty

In this paper we give two general formulae for the M\"uger centralizers in the category of representations of a semisimple quasitriangular Hopf algebra. The first formula is given in the terms of the Drinfeld map associated to the…

Quantum Algebra · Mathematics 2020-05-07 Sebastian Burciu

We classify finite-dimensional complex Hopf algebras $A$ which are pointed, that is, all of whose irreducible comodules are one-dimensional, and whose group of group-like elements $G(A)$ is abelian such that all prime divisors of the order…

Quantum Algebra · Mathematics 2010-06-29 N. Andruskiewitsch , H. -J. Schneider

We classify the conjugacy classes of minimally ramified nonabelian subgroups of order 8 in the Nottingham group $N(F_4)$. We then use finite automata to give explicit descriptions of representatives for each of these conjugacy classes.

Number Theory · Mathematics 2025-09-24 Kevin Keating

Let A be a character sheaf on a reductive connected group G over an algebraically closed field. Assuming that the characteristic is not bad, we show that for certain conjugacy classes D in G the restriction of A to D is a local system up to…

Representation Theory · Mathematics 2012-06-22 G. Lusztig

Let k be an algebraically closed field of characteristic 0. We conclude the classification of finite dimensional pointed Hopf algebras whose group of group-likes is S_4. We also describe all pointed Hopf algebras over S_5 whose…

Quantum Algebra · Mathematics 2018-06-01 Gaston Andres Garcia , Agustin Garcia Iglesias

We compute the character tables of the following groups with character theoretic methods, using known information about the conjugacy classes and about the character tables of some subgroups and factor groups: $Th$, $J_4$, $2.{}^2E_6(2)$,…

Representation Theory · Mathematics 2016-05-13 Thomas Breuer

In this paper we classify the finite groups satisfying the following property $P_4$: their orders of representatives are set-wise relatively prime for any 4 distinct non-central conjugacy classes.

Group Theory · Mathematics 2007-05-23 Xingzhong You , Guohua Qian , Wujie Shi

As part of the programme to re-compute the character tables of all the groups in the Atlas we re-compute the character table of $\mathbb M$, the Monster simple group. We operate under the uniqueness hypotheses of $\mathbb M$ and the…

Group Theory · Mathematics 2024-12-18 Thomas Breuer , Kay Magaard , Robert A. Wilson

We classify twisted conjugacy classes of type D associated to the sporadic simple groups. This is an important step in the program of the classification of finite-dimensional pointed Hopf algebras with non-abelian coradical. As a by-product…

Quantum Algebra · Mathematics 2013-03-18 F. Fantino , L. Vendramin
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