Dear Colleagues and Students,
You are cordially invited to the Analysis Seminar organized by the Department of Mathematics.
Speaker: Aurelian Gheondea (Bilkent)
“Distance of the set of commutators to the identity”
Abstract: According to a classical theorem of Wintner and Wielandt, the equation [A,B]=I does not have any solution A and B in the algebra of linear bounded operators B(H) on a Hilbert space H, where [A,B]=AB-BA denotes the commutator of A and B, and I denotes the identity operator on H. We present a survey of known results for the estimation of the distance from the set of commutators to the identity and some open questions. Senior and graduate students are welcome.
Date: Monday, October 21, 2019
Place: SA – Z18