Hall Algebras and Macdonald Polynomials
This is a project sponsored by
NWO, gebied Exacte Wetenschappen (project 613.006.573),
coordinated by
Tom Koornwinder and
Eric Opdam at the
KdV Institute,
Universiteit van Amsterdam, and performed first by
Hechun Zhang (JanuariDecember 2002; at present Tsinghua University,
Bejing, P.R. China) and next by
Uri Onn (October 2003  March 2004; at present
Ben Gurion University, Be'er Sheva, Israel).
Publications

H. Zhang,
The inverse of a real generalized Cartan matrix,
arXiv:math/0212207, 2002.

H. Zhang,
On dual canonical bases,
J. Phys. A: Math. Gen. 37 (2004), 78797803;
MR 2091744;
arXiv:math/0510288.

U. Bader and U. Onn,
On some geometric representations of GL(n,O),
Comm. Algebra 40 (2012), 31693191;
MR 2981129;
arXiv:math/0404408.

U. Bader and U. Onn,
Geometric representations of GL(n,R), cellular Hecke algebras
and the embedding problem,
J. Pure Appl. Algebra 208 (2007), 905922;
MR 2283434;
arXiv:math/0411461.

U. Onn,
From padic to real Grassmannians via the quantum,
Adv. Math. 204 (2006),
152175;
MR 2233130;
arXiv:math/0405138.

T.H. Koornwinder and U. Onn,
LU factorizations, q=0 limits, and padic interpretations
of some qhypergeometric orthogonal polynomials,
Ramanujan J. 13 (2007), 365387;
MR2281172;
arXiv:math/0405309.
Past activities
Seminar on Canonical Bases
This seminar ran from 1 February until 12 April 2002, with 6 sessions
and with lectures by Hechun Zhang and by Willem de Graaf.
Lectures by U. Onn
On the Grassmann representation of GL(n)
at KdV Institute, UvA
part I: 9 October 2003, 16.0017.00, room P.016.
part II: 17 October 2003, 11.0012.00, room P.015A.
to Tom Koornwinder's home page