- Algebraic Lie Theory and Representation Theory 2015 Towards a mathematical definition of Coulomb branches of 3-dimensional N=4 gauge theories
- Problems on quiver varieties, The 50th Geometry Symposium, Hokkaido Univ. 2003 Aug.
- Geometric construction of representations of affine algebras, gzipped postscript file for OHP sheets, ICM2002, Beijing, 2002 Aug.
- Quiver varieties and McKay correspondence, Proceeding of `Open Calabi-Yau manifolds -- approaches from algebraic geometry and string theory', 2001 Dec., Hokkaido, gzipped ps, pdf
- Moduli of sheaves on blown-up surfaces, pdf file, RIMS Ko-kyu-roku {\bf 1232} (2001), 29--33. Proceedings of RIMS Project 1999/2000, Algebraic Geometry and Integrable Systems related to String theory, June 12 (Mon)- 16 (Fri), 2000
- Lectures at the University of Hong Kong -- a geometric construction of algebras gzipped ps file , pdf file (access from H.K.U., Nagoya U., Kyoto U. only)
- ``$t$-analogue of the $q$-characters of finite dimensional representations of quantum affine algebras'', OHP sheets (gzipped ps file), International Workshop on Physics and Combinatorics 2000, Nagoya, 2000 Aug.
- Jack polynomials and Hilbert schemes of points (tar gzipped TeX/DVI files 72240bytes) , alg-geom/9610021.
- Quiver varieties, simple singularities and Kac-Moody algebras, OHP sheets for Representation Theory of Algebras and Related Topics, UNAM, Mexico City, Aug. 16 --20, 1994.
- Morse theory on moduli spaces of instantons on ALE scalar-flat K\"ahler surfaces, 1992 (?)
- Convergence of anti-self-dual metrics (1992?)