Calculus of Variations and Geometric Measure Theory

E. Tasso

On the blow-up of GSBV functions under suitable geometric properties of the jump set

created by tasso on 26 Jun 2019
modified on 06 Nov 2019


Accepted Paper

Inserted: 26 jun 2019
Last Updated: 6 nov 2019

Journal: Advances in Calculus of Variations
Year: 2019


In this paper we investigate the fine properties of functions under suitable geometric conditions on the jump set. Precisely, given $p>1$ we study the blow-up of functions $u \in GSBV$, whose jump sets belongs to an appropriate class $\mathcal{J}_p$ and whose approximate gradient is $p$-th power summable. In analogy with the theory of $p$-capacity in the context of Sobolev spaces, we prove that the blow-up of $u$ converges up to a set of Hausdorff dimension less than or equal to $n-p$. Moreover, we are able to prove the following result which in the case of $W^{1,p}(\Omega)$ functions can be stated as follows: whenever $u_k$ strongly converges to $u$, then up to subsequences, $u_k$ pointwise converges to $u$ except on a set whose Hausdorff dimension is at most $n-p$.