Joseph E. Avron and Lorenzo Sadun
Generic Jumps of Fredholm Indices and the Quantum Hall Effect
(51K, LaTeX with 1 embedded postscript figure)

ABSTRACT.  We describe the generic behavior of Fredholm indices in the space 
of Toeplitz operators. We relate this behavior to certain 
conjectures and open problems that arise in the context of the 
Quantum Hall Effect.