**THIS
WEEK’S SEMINARS**

**PLEASE CHECK WITH THE DEPARTMENT FOR ANY CHANGES
BEFORE ATTENDING**

**Monday 20**^{th} May2002

*Seminar:* Analysis Seminar

*Location & Time:* Meeting Room 4 (CMS) at 3.30 p.m.

*Speaker:* Professor David Singerman

*Title:* When can two dessins d'enfants lie on the same Riemann
surface?
*Seminar:* Topology Seminar

*Location & Time:* Meeting Room 4 (CMS) at 2.30 p.m.

*Speaker: *Dr M Weiss
*Title:* Automorphisms of smooth surfaces and the Mumford Conjecture
**Tuesday 21**^{st} May 2002

*Seminar: *Number Theory Seminar

*Location & Time:* Meeting Room 4 (CMS) at 2.30 p.m.

*Speaker:* Dick Gross
*Title:* L-functions and the comparison of Haar measures
*Seminar:* Category Theory Seminar

*Location & Time:* Meeting Room 9 (CMS) at 2.15 p.m.

*Speaker: *Justin Sawon
*Title:* Rozansky-Witten weight systems and Lie algebra objects
*Seminar:* MORDELL LECTURE

*Location & Time:* Meeting Room 2, Wolfson Room (CMS) at 4.30
p.m.

*Speaker: *Professor Yakov Eliashberg
*Title:* Symplectic Field Theory: Its Structure and Applications
*Seminar:* Combinatorics Seminar

*Location & Time:* Meeting Room 12 (CMS) at 2.00 p.m.

*Speaker: *Dr Alan Stacey
*Title:* Percolation on finite graphs (Joint Probability and
Combinatorics Seminar)

**Wednesday 22**^{nd}
May 2002

*Seminar:* Algebra Seminar

*Location & Time:* Meeting Room 12 (CMS) at 4.30 p.m.

*Speaker:* Professor N Gordeev

*Title:* Presentation of algebraic groups as groups of automorphisms
of algebras
**Thursday 23**^{rd} May 2002

*Seminar:* Combinatorics Seminar

*Location & Time:* Meeting Room 4 (CMS) at 4.00 p.m.

*Speaker:* Dr Robin Chapman
*Title:* Alternating sign matrices and tournaments
*Seminar:* Study Group on Iwasawa algebras

*Location & Time:* Meeting Room 3 (CMS) at 2.15 p.m.

*Speaker:* Professor John Coates
*Title:* Iwasawa algebras on p-adic Lie groups, and related questions
in Number Theory and Algebra