Douglis–Nirenberg elliptic systems in Hörmander spaces
Douglis–Nirenberg elliptic systems in Hörmander spaces
Douglis–Nirenberg systems uniformly elliptic in ℝ n are studied in the class of Hörmander Hilbert spaces H φ ; where φ is an RO-varying function of scalar argument. An a priori estimate is established for the solutions, and their interior regularity is investigated. A sufficient condition under which these systems …