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On January 22, 2024, Monday, at 1:00 pm, in Room 478 of IMI-BAS,

Assoc. Prof. Stoyu Barov will deliver an inaugural lecture on:

On closed sets with convex projections in separable Hilbert spaces”

 

Abstract.  We discuss closed sets in R^n and in Hilbert space l^2 all of whose shadows (projections onto hyperplanes) are convex. Among other theorems,  we show that if C is a closed and nonconvex set in Hilbert space l^2 such that the closures of the projections onto all hyperplanes are convex and proper, then C must contain a closed topological copy of l^2.

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