| Abstract: In 1994, James Arthur published a formula for the Lefschetz number of the action of a Hecke operator on L2 cohomology. His formula is expressed in group-theoretic terms: centralizers of elliptic elements, discrete series characters, etc. This talk will provide some background on Hecke operators and L2 cohomology, and then describe a purely topological approach to this problem which eventually yields geometrical intepretations for each of the terms in Arthur's formula. This is joint work with R. MacPherson |
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| Web page: Alexandru I. Suciu | Created: Jan. 21, 1999 Updated: Jan. 21, 1999 |
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URL: http://www.math.neu.edu/~suciu/gas/goresky.html |