Elliptic problems in Besov and Sobolev—Triebel—Lizorkin spaces of low regularity
Elliptic problems in Besov and Sobolev—Triebel—Lizorkin spaces of low regularity
Elliptic problems with additional unknown distributions in boundary conditions are investigated in Besov and Sobolev–Triebel–Lizorkin spaces of low regularity, specifically of an arbitrary negative order. We find that the problems induce Fredholm bounded operators on appropriate pairs of these spaces.