In this paper we study the asymptotic and qualitative properties of least energy radial sign- changing solutions of the fractional Brezis–Nirenberg problem ruled by the s-Laplacian, in a ball of R^n, when s ∈ (0,1) and n > 6s. As usual, λ is the (positive) parameter in the linear part in u. We prove that for λ sufficiently small such solutions cannot vanish at the origin, we show that they change sign at most twice and their zeros coincide with the sign-changes. Moreover, when s is close to 1, such solutions change sign exactly once. Finally we prove that least energy nodal solutions which change sign exactly once have the limit profile of a “tower of bubbles”, as λ → 0+, i.e. the positive and negative parts concentrate at the same point with different concentration speeds.

On the structure of the nodal set and asymptotics of least energy sign-changing radial solutions of the fractional Brezis–Nirenberg problem / G. Cora, A. Iacopetti. - In: NONLINEAR ANALYSIS. - ISSN 0362-546X. - 176(2018 Nov), pp. 226-271. [10.1016/j.na.2018.07.001]

On the structure of the nodal set and asymptotics of least energy sign-changing radial solutions of the fractional Brezis–Nirenberg problem

A. Iacopetti
2018

Abstract

In this paper we study the asymptotic and qualitative properties of least energy radial sign- changing solutions of the fractional Brezis–Nirenberg problem ruled by the s-Laplacian, in a ball of R^n, when s ∈ (0,1) and n > 6s. As usual, λ is the (positive) parameter in the linear part in u. We prove that for λ sufficiently small such solutions cannot vanish at the origin, we show that they change sign at most twice and their zeros coincide with the sign-changes. Moreover, when s is close to 1, such solutions change sign exactly once. Finally we prove that least energy nodal solutions which change sign exactly once have the limit profile of a “tower of bubbles”, as λ → 0+, i.e. the positive and negative parts concentrate at the same point with different concentration speeds.
Fractional semilinear elliptic equations, Critical exponent, Nodal regions, Sign-changing radial solutions, Asymptotic behavior
Settore MAT/05 - Analisi Matematica
nov-2018
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/770705
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