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math.AP2014
Lower bounds for pseudodifferential operators with a radial symbol
Laurent Amour, Lisette Jager, Jean Nourrigat
In this paper we establish explicit lower bounds for pseudodifferential operators with a radial symbol. The proofs use classical Weyl calculus techniques and some useful, if not ce…
math.AP2010
A remark concerning Feynman Kac formulas for the perturbed harmonic oscillator
L. Jager
We give the solution of certain parabolic evolution problems (time-depending perturbations of the heat equation for the harmonic oscillator) as explicit integrals on the Wiener spa…