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Algebras in Analysis
April 8, 2022 18:00, Moscow, online via Zoom


Frames in $C^*$-algebras and the stabilization theorem

D. V. Fufaev


https://youtu.be/s6mw_LWOtrk

Abstract: Kasparov's theorem states that every countably generated Hilbert $C^*$-module over a $C^*$-algebra $A$ stabilizes, i.e., it can be represented as a direct summand of the direct sum of countably many copies of $A$. This property fails for uncountably generated modules and uncountable direct sums. In fact, this property is almost equivalent to the existence of the so-called standard frame. In this talk, we discuss the existence of such frames and some other related problems in the case of a commutative $C^*$-algebra considered as a module over itself.


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