Abstract:

The talk starts with an elementary combinatorial construction called 'worm diagrams'. This can be seen as a graphical way to describe the possible games of the well-known children play 'musical chairs'. In the second part we give an interpretation of worm diagrams in terms of representations of a certain quiver that plays an important role for several open problems. Here I just mention Richardson's dense orbit theorem and the classification of tilting modules. In the last part we consider rational surfaces and give an interpretation of the worm diagrams for a classification problem on certain rational surfaces with spherical twists.

Tee/Kaffee/Gebäck
ab  16:45 Uhr,
Arnimallee 3,  Raum 006

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Koordinator:  Prof. Dr. Alexander Schmitt

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