Geodesic
Existence of boundary values for biharmonic functions
Sbornik. Mathematics, Tome 195 (2004) no. 12, pp. 1781-1793 
V. P. Mikhailov. Existence of boundary values for biharmonic functions. Sbornik. Mathematics, Tome 195 (2004) no. 12, pp. 1781-1793. http://geodesic.mathdoc.fr/item/SM_2004_195_12_a4/
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     title = {Existence of boundary values for biharmonic functions},
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     url = {http://geodesic.mathdoc.fr/item/SM_2004_195_12_a4/}
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Voir la notice de l'article provenant de la source Math-Net.Ru

Criteria for the existence of an $L_2$-limit and a weak $L_2$-limit of a biharmonic function at the regular analytic boundary of a bounded two-dimensional domain are established.

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