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math.DG2000
Novikov - Shubin signatures, II
Michael Farber
This paper continues math.DG/9903140. Here we construct a linking form on the torsion part of middle dimensional extended L^2 homology and cohomology of odd-dimensional manifolds.…
math.AT2000
Topology of billiard problems, II
Michael Farber
We give topological lower bounds on the number of periodic and closed trajectories in strictly convex smooth billiards. We use variational reduction admitting a finite group of sym…
math.DG2000
Topology of billiard problems, I
M. Farber
Let be a strictly convex domain bounded by a smooth hypersurface . In this paper we find lower bounds on the number of billiard trajectories in $T…