Cellularity of generalized Schur algebras via Cauchy decomposition

渐近 Schur 代数与 q-Schur 代数的胞腔性

Asymptotic Schur algebras and cellularity of q-Schur algebras

本文证明了有限型 q-Schur 代数的胞腔性，推广了 Geck 的定理，并研究了渐近 Schur 代数的特殊模与 Schur 代数的左胞腔表示，推广了 Lusztig 的相关工作。

A plactic algebra of extremal weight crystals and the Cauchy identity for Schur operators

We give a new bijective interpretation of the Cauchy identity for Schur operators which is a commutation relation between two formal power series with operator coefficients. We introduce a plactic algebra associated with the Kashiwara's extremal weight crystals over the Kac-Moody algebra of type $A_{+\infty}$, and construct a Knuth type correspondence preserving the plactic relations. This bijection yields the Cauchy identity for Schur operators as a homomorphic image of its associated identity for plactic characters of extremal weight crystals, and also recovers the Sagan and Stanley's corres…

On $q$-Schur algebras corresponding to Hecke algebras of type B

In this paper the authors investigate the $q$-Schur algebras of type B that were constructed earlier using coideal subalgebras for the quantum group of type A. The authors present a coordinate algebra type construction that allows us to realize these $q$-Schur algebras as the duals of the $d$th graded components of certain graded coalgebras. Under suitable conditions an isomorphism theorem is proved that demonstrates that the representation theory reduces to the $q$-Schur algebra of type A. This enables the authors to address the questions of cellularity, quasi-hereditariness and representatio…

亏格2 Schur多项式的Cauchy恒等式

Cauchy identities for genus 2 Schur polynomials

本文研究亏格2 Macdonald多项式的Cauchy恒等式，在$t=q=1$即亏格2 Schur多项式的特定情况下，构造了Cauchy恒等式的亏格2推广。

On Higher Frobenius-Schur Indicators

We study the higher Frobenius-Schur indicators of modules over semisimple Hopf algebras, and relate them to other invariants as the exponent, the order, and the index. We prove various divisibility and integrality results for these invariants. In particular, we prove a version of Cauchy's theorem for semisimple Hopf algebras. Furthermore, we give some examples that illustrate the general theory.

图示Okada幺半群与Okada代数的胞腔性

Diagrammatic Okada monoid and cellularity of the Okada algebra

本文利用带标记非交叉弧图实现Okada代数与Okada幺半群，证明其维数、正则性等性质，构造其胞腔基并提出相关猜想，推进对称群与Okada代数的类比研究。