A note on invariants of flows induced by Abelian differentials on Riemann surfaces

Details A note on invariants of flows induced by Abelian differentials on Riemann surfaces A note on invariants of flows induced by Abelian differentials on Riemann surfaces

2004-02-11

arxiv.org/abs/math/0402177v1

Mathematics

Operator Algebras

23 pages

Scientific paper

The real and imaginary part of any Abelian differential on a compact Riemann surface define two flows on the underlying compact orientable $C^\infty$ surface. Furthermore, these flows induce an interval exchange transformation on every transversal simple closed curve, via Poincar\'e recurrence. This note shows that the ordered $K_0$ groups of several $C^\ast$ algebras naturally associated to one of the flows resp. interval exchange transformations are isomorphic, mainly using methods of I. Putnam.

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