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Cari amici,<br>
<br>
vi segnalo il prossimo <u>doppio</u> seminario di ED a Tor Vergata:<br>
<br>
<h2>Martedi' 16 Aprile 2013, h 14:30, Aula Dal Passo
</h2>
<h2>Friedemann Schuricht - Università di Dresda
</h2>
<h2>Eigenvalue problem of the 1-Laplace operator.<br>
<br>
The eigenvalue problem of the $p$-Laplace operator is extensively
studied for $p>1$. We are interested in the highly degenerated
limit case $p=1$ where some new phenomena can be observed.
First, the formal eigenvalue equation is not well defined
and one has to clarify what an eigensolution of the $1$-Laplace
operator
should be. Then the existence of a sequence of eigensolutions can
be
shown. Since the corresponding eigenvalue equation has too many
solutions, a further equation satisfied by eigensolutions is
derived.</h2>
<h2>Martedi' 16 Aprile 2013, h 15:30, Aula Dal Passo
</h2>
<h2>Carlo Mantegazza - Scuola Normale Superiore di Pisa
</h2>
<h2>Evolution by curvature of a triod in the plane (Joint work with
Matteo Novaga and Annibale Magni).<br>
<br>
We consider the motion by curvature of a network of three smooth
embedded
curves in a convex subset of the plane, connected through a triple
junction (a triod) and with fixed endpoints on the boundary.
Such a flow represents the evolution of a two-dimensional 3-phase
system where the energy is simply the sum of the lengths of the
interfaces, moreover, this is the simplest example of curvature
flow of a set which is ``essentially'' non regular.
We prove that the flow exists smooth until the lengths of the
three curves stay far from zero. If this is the case for all
times, then the network converges to the Steiner minimal
connection between the three endpoints.
Finally, we discuss some other recent results and the possible
generalizations to higher dimensions. </h2>
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<br>
<pre class="moz-signature" cols="72">--
Daniele Castorina
Dipartimento di Matematica - Studio 1221
Università di Roma "Tor Vergata"
Via della Ricerca Scientifica 00133 Roma
email: <a class="moz-txt-link-abbreviated" href="mailto:castorin@mat.uniroma2.it">castorin@mat.uniroma2.it</a>
tel: +390672594653</pre>
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