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September 2026

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2026.10.02 표현론 세미나 안내
by 이승빈 25 Sep '26

25 Sep '26

표현론 세미나 구독자 분들께 안녕하세요. 10월 2일 오전 10시에 예정된 온라인 (Zoom) 세미나에 대해서 안내 드립니다. -------------------------------------------------------------------------------------------------------- 일시: 10.02 금 오전 10시 연사: Kyungtak Brian Hong (Purdue University) Title: Orthosymplectic quantum supergroups revisited Abstract: A fundamental structural property of Drinfeld-Jimbo quantum (super)groups is their realization as a Drinfeld double, implying quasitriangularity via the universal $R$-matrix. Evaluating this $R$-matrix on a specific representation gives rise to the RLL (or RTT) realization, a quantum analogue of the matrix realization of classical Lie (super)algebras. This talk discusses the relationship between the Drinfeld-Jimbo and RLL realizations for orthosymplectic quantum supergroups. First, we compute the finite and affine $R$-matrices. By embedding the nilpotent half into a shuffle superalgebra, we construct dual PBW bases and factorize the reduced $R$-matrix into an ordered product of local $q$-exponents. Applying Yang-Baxterization then yields the explicit affine $R$-matrix $R(z)$. Second, these $R$-matrices are used to define the RLL realization. To construct a direct Hopf superalgebra isomorphism and establish injectivity—traditionally done using representation theory, which is more subtle in the super setup—we leverage generalized Drinfeld double structures and the non-degenerate skew-pairing between Borel subalgebras. Zoom 회의 참가 https://us02web.zoom.us/j/84168573011?pwd=W5H0d1vnCflA3L7DxxhswMg3UFIRCP.1 회의 ID: 841 6857 3011 암호: 20261002 ------------------------------------------------------------------------------------------- 감사합니다. 이승빈 올림.

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