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For the BGG category of $\mathfrak{q}(n)$-modules of half-integer weights, a Kazhdan-Lusztig conjecture \`a la Brundan is formulated in terms of categorical canonical basis of the $n$th tensor power of the natural representation of the…

Representation Theory · Mathematics 2017-10-04 Shun-Jen Cheng , Jae-Hoon Kwon , Weiqiang Wang

We establish a direct connection between the representation theories of Lie algebras and Lie superalgebras (of type A) via Fock space reformulations of their Kazhdan-Lusztig theories. As a consequence, the characters of finite-dimensional…

Representation Theory · Mathematics 2008-07-22 Shun-Jen Cheng , Weiqiang Wang , R. B. Zhang

Generalizing the super duality formalism for finite-dimensional Lie superalgebras of type $ABCD$, we establish an equivalence between parabolic BGG categories of a Kac-Moody Lie superalgebra and a Kac-Moody Lie algebra. The characters for a…

Representation Theory · Mathematics 2016-06-21 Shun-Jen Cheng , Jae-Hoon Kwon , Weiqiang Wang

We develop a new method to solve the irreducible character problem for a wide class of modules over the general linear superalgebra, including all the finite-dimensional modules, by directly relating the problem to the classical…

Representation Theory · Mathematics 2015-05-13 Shun-Jen Cheng , Ngau Lam

We establish a maximal parabolic version of the Kazhdan-Lusztig conjecture \cite[Conjecture 5.10]{CKW} for the BGG category $\mathcal{O}_{k,\zeta}$ of $\mathfrak{q}(n)$-modules of "$\pm \zeta$-weights", where $k\leq n$ and…

Representation Theory · Mathematics 2016-02-16 Chih-Whi Chen , Shun-Jen Cheng

We apply the super duality formalism recently developed by the authors to obtain new equivalences of various module categories of general linear Lie superalgebras. We establish the correspondence of standard, tilting, and simple modules, as…

Representation Theory · Mathematics 2012-12-19 Shun-Jen Cheng , Ngau Lam , Weiqiang Wang

We introduce the definition of the typical irreducible modules of the generalized quantum groups, and prove the Weyl-Kac-type formulas of their characters. As a by-product, we obtain the Weyl-Kac-type character formulas of the typical…

Quantum Algebra · Mathematics 2019-11-01 Hiroyuki Yamane

The generalized Kazhdan-Lusztig polynomials for the finite dimensional irreducible representations of the general linear superalgebra are computed explicitly. Using the result we establish a one to one correspondence between the set of…

Quantum Algebra · Mathematics 2007-05-23 Yucai Su , R. B. Zhang

We classify and explicitly construct the irreducible graded representations of anti-spherical Hecke categories which are concentrated in one degree. Each of these homogeneous representations is one-dimensional and can be cohomologically…

Representation Theory · Mathematics 2023-01-20 Chris Bowman , Amit Hazi , Emily Norton

In [Kac77, Section 5.4] and [Kac 98], V. G. Kac tried to raise, and finished a classification of infinite-dimensional primitive Lie superalgebras. The series $\mathbf{W}(m,n)$ with $m,n$ being positive integers are the fundamental ones. In…

Representation Theory · Mathematics 2025-03-25 Priyanshu Chakraborty , Yuhui shen , Bin Shu

Finite W-algebras are certain associative algebras arising in Lie theory. Each W-algebra is constructed from a pair of a semisimple Lie algebra g (our base field is algebraically closed and of characteristic 0) and its nilpotent element e.…

Representation Theory · Mathematics 2019-02-20 Ivan Losev , Victor Ostrik

We generalize a construction in [BW18] (arXiv:1610.09271) by showing that the tensor product of a based $\textbf{U}^{\imath}$-module and a based $\textbf{U}$-module is a based $\textbf{U}^{\imath}$-module. This is then used to formulate a…

Quantum Algebra · Mathematics 2020-07-07 Huanchen Bao , Weiqiang Wang , Hideya Watanabe

We consider the finite W-superalgebras for a basic classical Lie superalgebra g associated with an even nilpotent element in g both over the field of complex numbers field and and over a filed of positive characteristic. We present the PBW…

Representation Theory · Mathematics 2014-05-13 Yang Zeng , Bin Shu

In this paper we classify and give Kazhdan-Lusztig type character formulas for equivariantly irreducible representations of Lie algebras of reductive algebraic groups over a field of large positive characteristic. The equivariance is with…

Representation Theory · Mathematics 2020-11-17 Roman Bezrukavnikov , Ivan Losev

The main goal of this paper is to compute two related numerical invariants of a primitive ideal in the universal enveloping algebra of a semisimple Lie algebra. The first one, very classical, is the Goldie rank of an ideal. The second one…

Representation Theory · Mathematics 2014-08-05 Ivan Losev

We formulate and establish a super duality which connects parabolic categories $O$ between the ortho-symplectic Lie superalgebras and classical Lie algebras of $BCD$ types. This provides a complete and conceptual solution of the irreducible…

Representation Theory · Mathematics 2011-02-01 Shun-Jen Cheng , Ngau Lam , Weiqiang Wang

We give a new interpretation of representation theory of the finite-dimensional half-integer weight modules over the queer Lie superalgebra $\mathfrak{q}(n)$. It is given in terms of Brundan's work of finite-dimensional integer weight…

Representation Theory · Mathematics 2016-10-25 Shun-Jen Cheng , Jae-Hoon Kwon

For semisimple Lie algebras, the BGG resolution is often viewed as a categorification of the Weyl character formula. For general linear Lie superalgebras, Brundan--Stroppel constructed an infinite resolution of the so-called Kostant simple…

Representation Theory · Mathematics 2026-02-05 Shunsuke Hirota

Let $\mathfrak{g}=\mathfrak{g}_{\bar{0}}+\mathfrak{g}_{\bar{1}}$ be a basic Lie superalgebra, $\mathcal{W}_0$ (resp.$\mathcal{W}$) be the finite W-(resp.super-) algebras constructed from a fixed nilpotent element in…

Representation Theory · Mathematics 2022-10-18 Husileng Xiao

In the paper we consider the problem of computation of characters of relatively integrable irreducible highest weight modules $L$ over finite-dimensional basic Lie superalgebras and over affine Lie superalgebras $\mathfrak{g}$. The problems…

Representation Theory · Mathematics 2014-06-27 Maria Gorelik , Victor Kac
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