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 ...

Some algorithms based upon a projection process onto the Krylov subspace $K_m = \operatorname{Span}(r_0, Ar_0, \ldots, A^{m - 1}r_0)$ are developed, generalizing the ...

In the world of "Star Trek," just about every technology that makes Starfleet's explorations possible hinges on the existence of one discovery: subspace physics. An amorphous fictional construct ...

Fast multilevel augmentation methods based on projections for solving Hammerstein equations are developed. Each of these methods requires availability of a multilevel decomposition of the solution ...