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+  {{DISPLAYTITLE:<span style="display:none">{{FULLPAGENAME}}</span>}}  
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  In this wiki we collect several results about nonlocal elliptic and parabolic equations. If you want to know what a nonlocal equation refers to, a good starting point would be the [[Intro to nonlocal equations]].  +  In this wiki we collect several results about nonlocal elliptic and parabolic equations. If you want to know what a nonlocal equation refers to, a good starting point would be the [[Intro to nonlocal equations]]. If you want to find information on a specific topic, you may want to check the [[list of equations]] or use the search option on the left. 
We also keep a list of [[open problems]] and of [[upcoming events]].  We also keep a list of [[open problems]] and of [[upcoming events]].  
  
The wiki has an assumed bias towards regularity results and consequently to equations for which some regularization occurs. But we also include some topics which are tangentially related, or even completely unrelated, to regularity.  The wiki has an assumed bias towards regularity results and consequently to equations for which some regularization occurs. But we also include some topics which are tangentially related, or even completely unrelated, to regularity.  
+  Some answers, including how to participate, can be found in the section about [[frequently asked questions]].  
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* The denoising algorithms in [[nonlocal image processing]] are able to detect patterns in a better way than the PDE based models. A simple model for denoising is the [[nonlocal mean curvature flow]].  * The denoising algorithms in [[nonlocal image processing]] are able to detect patterns in a better way than the PDE based models. A simple model for denoising is the [[nonlocal mean curvature flow]].  
* The [[Boltzmann equation]] models the evolution of dilute gases and it is intrinsically an integral equation. In fact, simplified [[kinetic models]] can be used to derive the [[fractional heat equation]] without resorting to stochastic processes.  * The [[Boltzmann equation]] models the evolution of dilute gases and it is intrinsically an integral equation. In fact, simplified [[kinetic models]] can be used to derive the [[fractional heat equation]] without resorting to stochastic processes.  
  * In conformal geometry,  +  * In conformal geometry, the [[conformally invariant operators]] encode information about the manifold. They include fractional powers of the Laplacian. 
* In oceanography, the temperature on the surface may diffuse though the atmosphere giving rise to the [[surface quasigeostrophic equation]].  * In oceanography, the temperature on the surface may diffuse though the atmosphere giving rise to the [[surface quasigeostrophic equation]].  
+  * Models for [[dislocation dynamics]] in crystals.  
* Several stochastic models, in particular particle systems, can be used to derive nonlocal equations like the [[Nonlocal porous medium equation]], the [[HamiltonJacobi equation with fractional diffusion]], [[conservation laws with fractional diffusion]], etc...  * Several stochastic models, in particular particle systems, can be used to derive nonlocal equations like the [[Nonlocal porous medium equation]], the [[HamiltonJacobi equation with fractional diffusion]], [[conservation laws with fractional diffusion]], etc...  
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<div style="fontsize:150%; border:none; margin:0; padding:.1em; color:#000;"> Suggested first reads </div>  <div style="fontsize:150%; border:none; margin:0; padding:.1em; color:#000;"> Suggested first reads </div>  
+  * [[Intro to nonlocal equations]]  
* [[Fractional Laplacian]]  * [[Fractional Laplacian]]  
* [[Linear integrodifferential operator]]  * [[Linear integrodifferential operator]]  
+  
+  * [[Fully nonlinear integrodifferential equations]]  
* [[Myths about nonlocal equations]]  * [[Myths about nonlocal equations]]  
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* [[Obstacle problem]]  * [[Obstacle problem]]  
  
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Latest revision as of 19:09, 23 September 2013

We also keep a list of open problems and of upcoming events. The wiki has an assumed bias towards regularity results and consequently to equations for which some regularization occurs. But we also include some topics which are tangentially related, or even completely unrelated, to regularity. Some answers, including how to participate, can be found in the section about frequently asked questions. 

