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arxiv: 1507.06691 · v1 · pith:37TVAZ5Nnew · submitted 2015-07-23 · 🧮 math.NA

DPG method with optimal test functions for a fractional advection diffusion equation

classification 🧮 math.NA
keywords advectionconvergencediffusionformulationfractionalfunctionsoptimaltest
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We develop an ultra-weak variational formulation of a fractional advection diffusion problem in one space dimension and prove its well-posedness. Based on this formulation, we define a DPG approximation with optimal test functions and show its quasi-optimal convergence. Numerical experiments confirm expected convergence properties, for uniform and adaptively refined meshes.

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