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We study the polyharmonic Neumann and mixed boundary value problems on theKor\'{a}nyi ball in the Heisenberg group $\H_n$. Necessary and sufficientsolvability conditions are obtained for the nonhomogeneous polyharmonic Neumannproblem and Neumann-Dirichlet boundary value problems.

Polyharmonic polynomials and mixed boundary value problems in the Heisenberg group $\mathbb H_n$