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Stochastic Nonlinear Diffusion Equations with Singular Diffusivity

Stochastic nonlinear diffusion equations with singular diffusivity
Authors: Barbu, Viorel; Da Prato, Giuseppe; Röckner, Michael;

Stochastic Nonlinear Diffusion Equations with Singular Diffusivity

Abstract

This paper is concerned with the stochastic diffusion equation \(dX(t)=\text{div}[\text{sgn}(\nabla(X(t)))]dt+\sqrt{Q}dW(t)\) in \((0,\infty) \times \mathcal{O}\), where \(\mathcal{O}\) is a bounded open subset of \(\mathbb{R}^d, d=1,2, W(t)\) is a cylindrical Wiener process on \(L^2(\mathcal{O})\), and \(\text{sgn}(\nabla X)=\nabla X/|\nabla X|_d\) if \(\nabla X\neq 0\) and sgn \((0)=\{v\in \mathbb{R}^d:|v|_d\leq 1\}\). The multivalued and highly singular diffusivity term \(\text{sgn}(\nabla X)\) describes interaction phenomena, and the solution \(X=X(t)\) might be viewed as the stochastic flow generated by the gradient of the total variation \(\|DX\|\). The main result says that this problem is well posed in the space of processes with bounded variation in the spatial variable \(\xi \). The above equation is relevant for modeling crystal growth as well as for total variation based techniques in image restoration.

Country
Germany
Related Organizations
Keywords

Wiener process, Stochastic partial differential equations (aspects of stochastic analysis), stochastic diffusion equation, bounded variation, Nonlinear parabolic equations

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
19
Average
Top 10%
Top 10%
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