Let $M$ be a von Neumann algebra with a faithful, normal, tracial state $\tau$ and $H^\infty$ be a finite, maximal, subdiagonal algebra of $M$. Every left- (or right ...

Two weeks ago, a modest-looking paper was uploaded to the arXiv preprint server with the unassuming title “On the invariant subspace problem in Hilbert spaces”. The paper is just 13 pages long and its ...

Let T be an operator with spectrum σ(T) on a Hilbert space. A compact subset E of σ(T) is called a disconnected part of σ(T) if, for some bounded open set A, E is the closure of σ(T) ∩ A and σ(T) - E ...

Mathematician Per Enflo, who solved a huge chunk of the 'invariant subspaces problem' decades ago, may have just finished his work. When you purchase through links on our site, we may earn an ...

Add Yahoo as a preferred source to see more of our stories on Google. Two weeks ago, a modest-looking paper was uploaded to the arXiv preprint server with the unassuming title “On the invariant ...

Two weeks ago, a modest-looking paper was uploaded to the arXiv preprint server with the unassuming title On the invariant subspace problem in Hilbert spaces. The paper is just 13 pages long and its ...