Abstract:
Studying the convergence in $L_{1, \mathrm{loc}}$ of homeomorphisms of class ${\mathcal Q}_{q,p}$ to some limit mapping, under additional assumptions, we prove that the norm of the operator distortion function is lower semicontinuous. We estimate the operator distortion function for $q < p$.
Keywords:lower semicontinuity, homeomorphism of class ${\mathcal Q}_{q,p}$, Carnot group.