Mathematical Methods in the Applied Sciences, 2024 (SCI-Expanded)
Let (Formula presented.) be a bounded domain with sufficiently smooth boundary (Formula presented.) and (Formula presented.) be a symmetric space defined on the measure space (Formula presented.). We consider a Dirichlet problem for (Formula presented.) -th order polyharmonic equation, and we establish its solvability (in strong sense) in Sobolev space (Formula presented.) generated by the norm of (Formula presented.). Such spaces include classical Sobolev spaces, Orlicz–Sobolev spaces, grand Sobolev spaces, and Marcinkiewicz–Sobolev spaces. The obtained results are new for these special cases, too.