$L^p$-boundeness properties of variation operators in the Schrodinger setting.

link: http://arxiv.org/abs/1010.3117
Abstract

In this paper we establish the $L^p$-boundedness properties of the variation
operators associated with the heat semigroup, Riesz transforms and commutator
between Riesz transforms and multiplication by $BMO(R^n)$-functions in the
Schr\"odinger setting.