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math.AP2011
Causal diffusion and its backwards diffusion problem
Richard Kowar
This article starts over the backwards diffusion problem by replacing the \emph{noncausal} diffusion equation, the direct problem, by the \emph{causal} diffusion model developed in…
math.AP2011★ 1 cited
On the causality of real-valued semigroups and diffusion
Richard Kowar
In this paper we show that a process modeled by a strongly continuous real-valued semigroup (that has a space convolution operator as infinitesimal generator) cannot satisfy causal…