We study regularity properties of solutions to operator equations on patchwise smooth manifolds ∂Ω\documentclass[12pt]{minimal}
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\begin{document}$$\partial \Omega $$\end{document}, e.g., boundaries of polyhedral domains Ω⊂R3\documentclass[12pt]{minimal}
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\begin{document}$$\Omega \subset \mathbb {R}^3$$\end{document}. Using suitable biorthogonal wavelet bases Ψ\documentclass[12pt]{minimal}
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\begin{document}$$\Psi $$\end{document}, we introduce a new class of Besov-type spaces BΨ,qα(Lp(∂Ω))\documentclass[12pt]{minimal}
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\begin{document}$$B_{\Psi ,q}^\alpha (L_p(\partial \Omega ))$$\end{document} of functions u:∂Ω→C\documentclass[12pt]{minimal}
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\begin{document}$$u:\partial \Omega \rightarrow \mathbb {C}$$\end{document}. Special attention is paid on the rate of convergence for best n-term wavelet approximation to functions in these scales since this determines the performance of adaptive numerical schemes. We show embeddings of (weighted) Sobolev spaces on ∂Ω\documentclass[12pt]{minimal}
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\begin{document}$$\partial \Omega $$\end{document} into BΨ,τα(Lτ(∂Ω)),1/τ=α/2+1/2\documentclass[12pt]{minimal}
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\begin{document}$$B_{\Psi ,\tau }^\alpha (L_\tau (\partial \Omega )), 1/\tau =\alpha /2 + 1/2$$\end{document}, which lead us to regularity assertions for the equations under consideration. Finally, we apply our results to a boundary integral equation of the second kind which arises from the double-layer ansatz for Dirichlet problems for Laplace’s equation in Ω\documentclass[12pt]{minimal}
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\begin{document}$$\Omega $$\end{document}.
