In this paper, we show that the minimizing problem Lambda(s,alpha) = inf(u(H) over dots(RN), u not equivalent to 0) integral(RN)vertical bar-Delta(s/2)u(x)vertical bar(2) dx/(integral(RN)vertical bar u(x)vertical bar(2)*(s,alpha)/vertical bar x vertical bar(alpha) dx)(2/2)*(s,alpha) (1) is achieved by a positive, radially symmetric and strictly decreasing function provided 0 < s < N/2, 0 < alpha < 2s. (C) 2014 Elsevier Ltd. All rights reserved.
机构:
Univ Udine, Dipartimento Sci Matemat Informat & Fis, Via Sci 206, I-33100 Udine, ItalyUniv Udine, Dipartimento Sci Matemat Informat & Fis, Via Sci 206, I-33100 Udine, Italy
Musina, Roberta
Nazarov, Alexander, I
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Steklov Inst, St Petersburg Dept, Fontanka 27, St Petersburg 191023, Russia
St Petersburg State Univ, Univ Skii Pr 28, St Petersburg 198504, RussiaUniv Udine, Dipartimento Sci Matemat Informat & Fis, Via Sci 206, I-33100 Udine, Italy