### Research interests

Lie algebras, quantum affine algebras, quantum group, representation theory. I am one of the organizers of the "Lie Theory" seminar.

### Publications and preprints

1. Extension of a theorem of Kostant for affine algebras. Journal of Algebra 199 (1998), no. 1, 290--301. (MR 99b:17031)
2. Characters of bounded $\widehat{\mathfrak{sl}(2)}$ modules. Journal of Algebra 230 (2000), no. 2, 540–557. (MR 2001m:17033)
3. (with A. Joseph) A Chevalley-Kostant presentation of basic modules for $\widehat{\mathfrak{sl}(2)}$ and the associated affine KPRV determinants at $q=1$. Bulletin des Sciences mathématiques 125 (2001), no. 2, 85–108. (MR 2002c:17006)
4. (with V. Chari) Quantum loop modules. Representation Theory 7, 56–80. (MR 2004b:17044)
5. Characters of simple bounded modules over an untwisted affine Lie algebra. Algebras and Representation theory 6 (2003), no. 2, 119–137 (MR 2004c:17052)
6. Littelmann's path crystal and combinatorics of certain integrable $\widehat{\mathfrak{sl}_{\ell+1}}$-modules of level zero. Journal of Algebra 269 (2003), no. 1, 347–372 (MR 2004j:17033)
7. (with P. Lamprou) Path model for quantum loop modules of fundamental type. International Mathematics Research Notices 2004 (2004), no. 14, 675–711 (MR 2004m:17033
8. (with V. Chari) Filtrations and completions of certain positive level modules of affine algebras. Advances in Mathematics 194 (2005), no. 2, 296–331 (MR 2006e:17018)
9. (with V. Chari) An application of free Lie algebras to polynomial current algebras and their representation theory. Contemporary Mathematics 392 (2005), 15–31 (MR 2007b:17037)
10. (with V. Chari) Current algebras, highest weight categories and quivers, Advances in Mathematics 216 (2007), no. 2, 811–840 (MR 2009d:17009)
11. (with V. Chari) Graded level zero integrable representations of affine Lie algebras, Transactions of the American Mathematical Society 360 (2008), no. 6, 2923–2940 (MR 2009d:17033)
12. (with V. Chari) A family of Koszul algebras arising from finite-dimensional representations of simple Lie algebras, Advances in Mathematics 220 (2009), no. 4, 1193–1221 (MR 2010h:16067)
13. Quivers with relations arising from Koszul algebras of $\mathfrak g$-invariants, Journal of Algebra 322 (2009), no. 12, 4430–4478 (MR 2558871)
14. (with V. Chari) Minimal affinizations as projective objects, Journal of Geometry and Physics 61 (2011), no. 3, 594–609 (MR2763623)
15. (with A. Berenstein) Quantum folding, International Mathematics Research Notices 2011 (2011), no. 21, 4821–4883 (MR2852300)
16. (with M. Bennett, V. Chari and N. Manning) On homomorphisms between global Weyl modules, Representation theory 15 (2011), 733–752 (MR2869017)
17. (with A. Berenstein) Quantum Chevalley groups, Contemporary Mathematics 592 (2013), 71–102 (MR3087940 )
18. (with A. Berenstein and D. Kazhdan) Integrable clusters, Comptes rendus de l'Académie de sciences (Mathématique) 353 (2015), no. 5, 387–390 (MR3334989)
19. (with A. Berenstein) Generalized Joseph's decompositions, Comptes rendus de l'Académie de sciences (Mathématique) 353 (2015), no. 10, 887–892i (MR3411217)
20. (with A. Berenstein) Primitively generated Hall algebras, Pacific Journal of Mathematics 281 (2016), no. 2, 287–331 (MR3463039)
21. (with V. Mazorchuk) Koszul duality for semidirect products and generalized Takiff algebras, Algebras and Representation theory (to appear)
22. (with A. Berenstein) Double canonical bases (submitted)
23. (with A. Berenstein) Canonical bases of quantum Schubert cells and their symmetries (submitted)

### Teaching

All course information is available to registered students via iLearn