Mixed problems with non-homogeneous boundary conditions in Lipschitz domains for second-order elliptic equations with a~parameter
Sbornik. Mathematics, Tome 187 (1996) no. 4, pp. 525-580

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For a second-order elliptic equation involving a parameter, with principal part in divergence form in Lipschitz domain $\Omega$ mixed problems (of Zaremba type) with non-homogeneous boundary conditions are considered for generalized functions in $W^1_2(\Omega )$. The Poincaré–Steklov operators on Lipschitz piece $\gamma$ of the domain's boundary $\Gamma$ corresponding to homogeneous mixed boundary conditions on $\Gamma \setminus \gamma$ are studied. For a homogeneous equation with separation of variables in a tube domain with Lipschitz section, the Fourier method is substantiated for homogeneous mixed boundary conditions on the lateral surface and non-homogeneous conditions on the ends.
@article{SM_1996_187_4_a2,
     author = {B. V. Pal'tsev},
     title = {Mixed problems with non-homogeneous boundary conditions in {Lipschitz} domains for second-order elliptic equations with a~parameter},
     journal = {Sbornik. Mathematics},
     pages = {525--580},
     publisher = {mathdoc},
     volume = {187},
     number = {4},
     year = {1996},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1996_187_4_a2/}
}
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B. V. Pal'tsev. Mixed problems with non-homogeneous boundary conditions in Lipschitz domains for second-order elliptic equations with a~parameter. Sbornik. Mathematics, Tome 187 (1996) no. 4, pp. 525-580. http://geodesic.mathdoc.fr/item/SM_1996_187_4_a2/