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VERSION:2.0
PRODID:-//Memento EPFL//
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SUMMARY:On some non-trivial approximation questions
DTSTART:20150109T151500
DTSTAMP:20260509T014703Z
UID:853dfc19ed54d7f9959bc86e110d95de92a8c2f913ecd3351426ec83
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Aldo Pratelli\, Universität Erlangen\nWe will discuss s
 ome questions about approximation of functions which are very simple to st
 ate but hard to solve. Basically\, we will see that the standard approxima
 tion tecniques (for instance\, mollification with a smoothing kernel) do n
 ot work if we want to approximate homeomorphisms with other homeomorphisms
 \, because the injektivity can be lost. We will first briefly describe a o
 ne-dimensional problem\, then the main two-dimensional one\; in particular
 \, the latter has been proposed more than 30 years ago by Ball and Evans\,
  and it would be fundamental to deal with more success with problems in no
 nlinear elasticity. We will present some recent positive answers\, even th
 ough\, the completely general problem is still open. (Joint works with S. 
 Daneri\, S. Hencl\, E. Radici).
LOCATION:
STATUS:CONFIRMED
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