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Chiedo scusa ma devo rettificare il giorno del seminario è il 25/6
non il 28/6 come erroneamente indicato nel precedente messaggio.
Quindi ripeto l'annuncio scusandomi per l'errore:<br>
<br>
<h2>Martedi' <font color="#ff0000">25 Giugno 2013</font>, h 14:30,
Aula D’ Antoni </h2>
<h2>Simon Brendle (Stanford University, USA)
</h2>
<h2>"Ricci flow and the sphere theorem in Riemannian geometry."<br>
<br>
In 1926, Hopf showed that every compact, simply connected manifold
with constant curvature 1 is isometric to the standard round
sphere. Motivated by this result, Hopf posed the question whether
a compact, simply connected manifold with sufficiently pinched
curvatured must be a sphere topologically. This question has been
studied by many authors during the past decades, a milestone being
the topological sphere theorem of Berger and Klingenberg. I will
discuss the history of this problem and sketch the proof of the
Differentiable Sphere Theorem (obtained in joint work with Schoen
in 2007). The proof relies on the Ricci flow method pioneered by
Richard Hamilton.</h2>
<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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