University of Heidelberg, **Applied Analysis Seminar**

Tuấn Tùng Nguyễn (University of Heidelberg)

Scaling equivalence between energy minimization by singular perturbation and finite elements on the Tartar square

*Seminar room 2*

Scaling equivalence between energy minimization by singular perturbation and finite elements on the Tartar square

We study a variational problem arising in the theory of elasticity. On the one hand we consider energy minimization of the elastic energy singularly perturbed by a surface energy term with factor ε. On the other hand we consider energy minimization of the elastic energy over piecewise affine functions on a triangulation with grid size √ε. The density of the elastic energy has wells on a set of certain gradients. Lorent (2008) shows that for some finite set of matrices with gauge invariance both minimization problems scale equivalently for ε → 0. In the thesis we adapt his proof to the case without gauge invariance where the set of matrices is the Tartar square.

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