On the relaxation of integral functionals depending on the symmetrized gradient

Kamil Kosiba, Filip Rindler

We prove results on the relaxation and weak* lower semicontinuity of integral functionals of the form \[ \mathcal{F}[u] := \int_Ω f \bigg( \frac{1}{2} \bigl( \nabla u(x) + \nabla u…