Zhongwei Shen
Absolute Continuity of Periodic Schrodinger Operators with Potentials 
in the Kato Class
(41K, AMS-TeX)

ABSTRACT.  We consider the Schrodinger operator $-\Delta +V$ in $R^d$ with 
periodic potential $V$ in the Kato class. We show that, if $d=2$ 
or $3$, the spectrum of $-\Delta +V$ is purely absolutely continuous.