Geodesic
On imbedding theorems for a natural extension of the sobolev class $W^l_p(\Omega)$
Izvestiya. Mathematics, Tome 4 (1970) no. 1, pp. 147-157 Cet article a éte moissonné depuis la source Math-Net.Ru

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In this paper the class $W^l_{p,\varphi}(\Omega,g)$ of functions is considered which have generalized derivatives of order $l$ in the region $\Omega$ and finite norm \begin{gather*} |f;W^l_{p,\varphi}(\Omega,g)|=|f;L_p(g)|+|f;L^l_{p,\varphi}(\Omega)| \\ (|f;L^l_{p,\varphi}(\Omega)|=\sum_{|r|=l}|\varphi D^rf;L_p(\Omega)|), \end{gather*} where $g$ is a bounded interior subregion of the region $\Omega$, and $\varphi$ a weight that degenerates on the boundary $\partial\Omega$ or at infinity. Continuous and completely continuous imbeddings $W^l_{p,\varphi}(\Omega,g)\to L^k_{p,\varphi_r}(\Omega)$ $(0\leqslant k$ are obtained. 
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     author = {J. V. Rybalov},
     title = {On imbedding theorems for a natural extension of the sobolev class $W^l_p(\Omega)$},
     journal = {Izvestiya. Mathematics},
     pages = {147--157},
     year = {1970},
     volume = {4},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1970_4_1_a7/}
}
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J. V. Rybalov. On imbedding theorems for a natural extension of the sobolev class $W^l_p(\Omega)$. Izvestiya. Mathematics, Tome 4 (1970) no. 1, pp. 147-157. http://geodesic.mathdoc.fr/item/IM2_1970_4_1_a7/

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