Spring 2000

Algebra and Analysis Seminars

DATE

TIME

ROOM

SPEAKER

TITLE

Jan. 25

2:10-3:00

RH 134

Dr. G. Brookfield
UW Madison

Classifying Modules by Extensions.

Abstract: Ring theorists have for years studied direct sum decompositions of modules motivated by the fact that finitely generated Z-modules can classified using such decompositions. In spite of these efforts, for most rings no analogous classification exists.
In my talk I will consider a classification in which the direct sum operation is replaced by extensions. That is, we will consider a module B to be "composed" of modules A and C, not when B is isomorphic to the direct sum of A and C, but rather when there is an exact sequence 0 -> A -> B -> C ->0.

Feb. 1

2:10-3:00

RH 134

David Jackson

Decision and Separability Problems for Semigroups I

Feb.15

2:10-3:00

RH 134

Jagat Sheth

Representations of Sn and GLn and the q-Schur algebra. I

Feb.22

2:10-3:00

RH 134

Jagat Sheth

Representations of Sn and GLn and the q-Schur algebra. I

Mar.13

4:00-5:00

RH 142

Jagat Sheth

Modular Representation Theory of the Symmetric Groups

Mar.15

4:00-5:00

RH 142

Greg Marks

2-Primal Rings and Skew Polynomials

Mar.17

4:00-5:00

RH 142

Scott Saccone

Banach Spaces of Fourier Series

Apr.18

2:10-3:00

RH 134

David Jackson

Two well-known theorems of E.A. Golubov.

 

Topology / Geometry Seminar

DATE

TIME

ROOM

SPEAKER

TITLE

Jan. 25

3:30-4:30

RH 128

Steve Harris

Topology from Causality: Boundaries of Spacetimes I

Feb. 1

3:30-4:30

RH 128

Steve Harris

Topology from Causality: Boundaries of Spacetimes II

Feb. 8

3:30-4:30

RH 134

Steve Harris

Topology from Causality: Boundaries of Spacetimes III

Feb. 29

3:30-4:30

RH 134

Steve Harris

Topology from Causality: Boundaries of Spacetimes IV

Mar. 7

SPRING BREAK

Mar. 14

3:30-4:30

RH 134

Michael Tsau

Linking numbers of singular links and the Alexander polynomial I

Mar. 20

4:10-5:10

RH 142

Bryan Clair

L2 Invariants of Manifolds and Graphs

Mar. 21

3:30-4:30

RH 134

Michael Tsau

Linking numbers of singular links and the Alexander polynomial II

Mar. 28

3:30-4:30

RH 134

John Kalliongis

The Nielsen Realization Problem I

Apr. 4

3:30-4:30

RH 134

John Kalliongis

The Nielsen Realization Problem II

Apr. 11

3:30-4:30

RH 134

Rachel Roberts

Essential Laminations, Basics I

Apr. 18

3:30-4:30

RH 134

Rachel Roberts

Essential Laminations, Basics II

Apr. 25

3:30-4:30

RH 134

Rachel Roberts

Essential Laminations, Basics III

May 2

3:30-4:30

RH 134

Kevin Scannell

"Progress on the classification problem of flat spacetimes"

May 9

3:30-4:30

RH 134

Kevin Scannell

"Progress on the classification problem of flat spacetimes" Cont'd

 

Working Seminar in Topology

Tuesdays 1:10 - 2:00 RH 209 and Wednesdays 2:10 - 3:00 in RH 207

SPEAKER

DATES

TOPIC(S)

Kevin Scannell

Jan 12 - Feb 2

Heegaard Splittings, Dehn Surgery, Cobordism

Anneke Bart

Feb 8 - Mar 15

Kneser's Theorem, Milnor's Theorem, Loop Theorem

Michael Tsau

Mar.21 - Mar. 26

Linking Number

You-Hong Gong

April 4 - April 18

A Theorem by Lickorish

Michael Tsau

April 19 - May 23

Surgery on Links