Joshua Kristian McCoy is a freelance writer and film critic from the United States. He is a lifelong film buff, a voting member of the Georgia Film Critics Association, a tournament-winning Smash Bros ...

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 ...

The Kalman variety of a linear subspace in a vector space consists of all endomorphisms that possess an eigenvector in that subspace. We study the defining polynomials and basic geometric invariants ...

This is a preview. Log in through your library . Abstract We analyze the convergence of an extended Krylov subspace method for the approximation of operator functions that appear in exponential ...