On fractional Laplacians – 3
ESAIM: Control, Optimisation and Calculus of Variations, Tome 22 (2016) no. 3, pp. 832-841.

We investigate the role of the noncompact group of dilations in R n on the difference of the quadratic forms associated to the fractional Dirichlet and Navier Laplacians. Then we apply our results to study the Brezis–Nirenberg effect in two families of noncompact boundary value problems involving the Navier−Laplacian.

Reçu le :
DOI : 10.1051/cocv/2015032
Classification : 47A63, 35A23
Mots clés : Fractional Laplace operators, Navier and Dirichlet boundary conditions, Sobolev inequality, critical dimensions
Musina, Roberta 1 ; Nazarov, Alexander I. 2, 3

1 Dipartimento di Matematica ed Informatica, Università di Udine, via delle Scienze, 206 – 33100 Udine, Italy
2 St.Petersburg Department of Steklov Institute, Fontanka 27, St.Petersburg, 191023, Russia.
3 St.Petersburg State University, Universitetskii pr. 28, St.Petersburg, 198504, Russia.
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Musina, Roberta; Nazarov, Alexander I. On fractional Laplacians – 3. ESAIM: Control, Optimisation and Calculus of Variations, Tome 22 (2016) no. 3, pp. 832-841. doi : 10.1051/cocv/2015032. http://www.numdam.org/articles/10.1051/cocv/2015032/

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