Lukasz Grabowski (Lancaster University): Approximation of groups with respect to the rank metric. Oberseminar C*-Algebren.
Tuesday, 08.01.2019 15:15 im Raum N2
I'll talk about an ongoing joint work with Gabor Elek about
approximation of groups with respect to the rank metric. The basic
question is the following variant of the Halmos problem about
commuting matrices: if A and B are large matrices such that the rank
of the image of the commutator is small, is it true that A and B
can be perturbed with small rank matrices in such a way that the
resulting matrices commute? There are interesting connections to
classical notions of commutative algebra, in particular we develop
what are perhaps some new (or forgotten) variants of Nullstellensatz
for primary ideals.
Angelegt am Tuesday, 13.11.2018 13:38 von Elke Enning
Geändert am Monday, 17.12.2018 10:59 von Elke Enning
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