Summer School "Coarse Index Theory", September 2630, 2016
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Sep 26, 2016 09:00 AM
to Sep 30, 2016 08:00 PM 
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Topic: Index theory is a prime example of fruitful interaction between analysis, geometry, topology and operator algebras.
The index is associated to a global differential operator and is computed from the set of solutions of the associated differential equation. It turns out, however, that the index has remarkable stability properties and can often be computed a priori without solving the differential equation. This uses index theorems and the underlying topology. On the other hand, the most interesting operators are tied to the geometry and the geometry determines the set of solutions. The most powerful implementations of this idea that the relevant operators lie in operator algebras which are specific to the situation at hand. The indices are then naturally defined as elements in Ktheory groups of these operator algebras.
It turns out that a particularly useful setup uses the ideas of ``coarse geometry''. The basic idea is to study (noncompact) metric spaces; but considering only their large scale features. A lot of this can be captured in appropriately associated C*algebras; the coarse C*algebras of the space (often called Roe algebra). This tool also applies to compact spaces, by passing first to their universal covering.
The corresponding manifestation of index theory in this context is ``coarse index theory'' or ``large scale index theory'' and has many interesting properties and applications.
The summer school will explain the relevant general background in index theory, operator algebras; and then focus on large scale geometry and index theory and its numerous applications.
Program: There will be lecture series by
 John Roe: Coarse geometry and index theory
 Thomas Schick: (Secondary) Coarse index and applications
 Rufus Willett: Asymptotic dimension(s) and index theory
 Rudolf Zeidler: Ktheory of C*algebras
along with daily exercise and discussion sessions in the afternoon.
Funding: As a general rule, you are supposed to arrive with your own funding but there are also some limited funds available.
Contact: Please send an informal email to enroll until September 1, 2016, latest, to Mrs. Ursula Wöske, coarse16@math.unifreiburg.de
Organizer: Nadine Große
Speakers: John Roe, Thomas Schick, Rufus Willett, Rudolf Zeidler
Poster: Poster Summer School 2016