Torus action on S n and sign-changing solutions for conformally invariant equations
Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 5, Tome 12 (2013) no. 1, pp. 209-237

We construct sequences of sign-changing solutions for some conformally invariant semilinear elliptic equation which is defined S n , when n≥4. The solutions we obtain have large energy and concentrate along some special submanifolds of S n . For example, for n≥4 we obtain sequences of solutions whose energy concentrates along one great circle or finitely many great circles which are linked to each other (and they correspond to Hopf links embedded in S 3 ×{0}⊂S n ). In dimension n≥5 we obtain sequences of solutions whose energy concentrates along a two-dimensional torus (which corresponds to a Clifford torus embedded in S 3 ×{0}⊂S n ).

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Classification : 53C21, 35J65
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     title = {Torus action on $S^{n}$ and sign-changing solutions for conformally invariant equations},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {209--237},
     year = {2013},
     publisher = {Scuola Normale Superiore, Pisa},
     volume = {Ser. 5, 12},
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del Pino, Manuel; Musso, Monica; Pacard, Frank; Pistoia, Angela. Torus action on $S^{n}$ and sign-changing solutions for conformally invariant equations. Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 5, Tome 12 (2013) no. 1, pp. 209-237. https://www.numdam.org/item/ASNSP_2013_5_12_1_209_0/

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