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Algebra & Combinatorics Seminar

Title: The combinatorics of the graded embeddings for Lie (super)algebras
Speaker: Md. Irfan Habib (Technical University of Munich, Germany)
Date: 24 August 2026
Time: 11 am
Venue: LH-1, Mathematics Department

In this talk, I will discuss the combinatorial aspects of graded embedding problems for Lie (super)algebras. Dynkin started the study in the 1950s in one of his seminal papers for finite-dimensional semisimple Lie algebras and it has expanded significantly since the late nineties through the work of several authors for affine and symmetrizable Kac–Moody algebras. I will present our results where we unify all the above-mentioned works systematically and prove that any root-generated subalgebra is of Kac–Moody type, essentially understanding the graded embeddings combinatorially. However, similar questions for superalgebras remain largely enigmatic – even in the finite-dimensional case. I will also discuss our recent contributions for Kac–Moody superalgebras, along with the challenges and novelties of the super case. This work is joint with Deniz Kus and Chaithra Pilakkat.


Contact: +91 (80) 2293 2711, +91 (80) 2293 2265 ;     E-mail: chair.math[at]iisc[dot]ac[dot]in
Last updated: 30 Jul 2026