News

Speaker: Professor Mikhail Khovanov (Columbia University) Abstract: We recall how the Jones polynomial of links lifts to a link homology theory which is functorial under link cobordisms in 4-space. Extending this homology theory to tangles relates the theory to a variety of categories in representation theory and geometry. Another extension, to a categorification of the …

SIMIS-Fudan Colloquium: Link homology theories and their ramifications Read More »

Speaker: Weiguang Cao (IPMU, Tokyo University) Abstract: Recently, the notion of symmetry has been generalized. While ordinary symmetry can be described by a (1) co-dimension 1, (2) topological operator with (3) group-like fusion rule, generalized symmetries are described by operators that relax one or more conditions. Generalized symmetry plays an important role not only in …

SIMIS Seminar on Field Theory and String Theory: Non-invertible Symmetry in Lattice Models Read More »

Speaker: Ye Yuan (Zhejiang University) Abstract: In this talk I will discuss a differential representation for holographic four-point correlators. In this representation, the correlators are given by acting differential operators on certain seed functions. The number of these functions is much smaller than what is normally seen in known examples of holographic correlators, and all …

SIMIS Seminar on Field Theory and String Theory: A differential representation for holographic correlators Read More »

Speaker: Junwu Tu (ShanghaiTech University) Abstract: We shall discuss the categorical enumerative invariants associated with a smooth projective family of Calabi-Yau 3-folds. In particular, we study the holomorphic anomaly equations in this context. This naturally leads to the study of geometric structures on moduli spaces of smooth projective Calabi-Yau 3-folds. Time: 16:00 ~ 17:00, Mon., Mar. 25, 2024 …

SIMIS Seminar on Field Theory and String Theory: Geometry from Categorical Enumerative Invariants Read More »

Speaker: Satoshi Nawata (Fudan University) Abstract: The study of 3d mirror symmetry has greatly enhanced our understanding of various aspects of 3d N=4 theories. In this talk, starting with known mirror pairs of 3d N=4 quiver gauge theories and gauging discrete subgroups of the flavour or topological symmetry, I discuss new mirror pairs with non-trivial …

SIMIS Seminar on Field Theory and String Theory: Duality of 3d N=4 theories with 1-form symmetry Read More »

Speaker: Xinan Zhou (Kavli ITS, UCAS & ShanghaiTech University) Abstract: In this talk, I will discuss correlation functions in 6d (2, 0) theories of two 1/2-BPS operators inserted away from a 1/2-BPS surface defect. In the large central charge limit the leading connected contribution corresponds to sums of tree-level Witten diagram in AdS7×S4 in the …

SIMIS Seminar on Field Theory and String Theory: Defect Two-point Functions in 6d (2,0) Theories Read More »

CRASH COURSE : N=1 d=10 SYM and its SUSY from pure spinors point of view.A.Losev (SIMIS) Plan of the crash course:1.BV formalism and infinity-structures2.BV integral and theorem of homotopical transit3.Symmetries and higher symmetries from BV point of view4.Examples of higher symmetries in ordinary and in supersymmetric theories5.Spinors in different dimensions and their proprieties6.Fundamental theory formulated …

CRASH COURSE: N=1 d=10 SYM and its SUSY from pure spinors point of view Read More »

The opening ceremony of ICCM Annual 2023 was held on January 2, 2024. 【要闻】聚焦基础科学，探索数学学科发展新篇章！世界华人数学家联盟年会开幕，陈吉宁书记出席并致辞