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<p>SEMINARIO DI EQUAZIONI DIFFERENZIALI<br>
<br>
Dipartimento di Matematica<br>
Universitā degli Studi di Roma "Tor Vergata"<br>
<br>
<br>
Martedė 2 luglio 2019, ore 14:30 Aula Dal Passo<br>
<br>
Hugo Tavares (Universidade de Lisboa) <br>
<br>
Titolo: <span class="gmail-m_6900072238003335032gmail-im">Least
energy solutions of Hamiltonian elliptic systems with Neumann
boundary conditions</span><br>
<br>
Sunto: In this talk we will discuss existence and qualitative
properties of solutions to a class of Hamiltonian elliptic systems
with Neumann boundary conditions ,both in the sublinear and
superlinear problems, in the subcritical regime. In balls and
annuli we show that least energy solutions (l.e.s.) are <i>not</i>
radial functions, but only partially symmetric (namely foliated
Schwarz symmetric). A key element in the proof is a new
L^t-norm-preserving transformation, which combines a suitable
flipping with a decreasing rearrangement. This combination allows
us to treat annular domains, sign-changing functions, and Neumann
problems, which are non-standard settings to use rearrangements
and symmetrizations. Our theorems also apply to the scalar
associated model, where our approach provides new results as well
as alternative proofs of known facts. This is a joint work with
Alberto Saldaņa. <br>
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(*) this seminar is part of the activity of the MIUR Excellence
Department Project CUP E83C18000100006<br>
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<a class="moz-txt-link-freetext" href="http://www.mat.uniroma2.it/~ricerca/analis/Seminario%20di%20Equazioni%20Differenziali.html">http://www.mat.uniroma2.it/~ricerca/analis/Seminario%20di%20Equazioni%20Differenziali.html</a><br>
<br>
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Via della Ricerca Scientifica 1<br>
00133 Rome (Italy)<br>
<br>
Phone: +39 06 72594668<br>
Fax: +39 06 72594699<br>
Email: <a class="moz-txt-link-abbreviated" href="mailto:molle@mat.uniroma2.it">molle@mat.uniroma2.it</a><br>
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