Video Lectures

If a monomorphism of abstract groups H?G induces an isomorphism of profinite completions, then (G,H) is called a Grothendieck pair, recalling the fact that Grothendieck asked about the existence of such pairs with G and H finitely presented and...

Reproducibility in Learning

Jessica Sorrell

Reproducibility is vital to ensuring scientific conclusions are reliable, but failures of reproducibility have been a major issue in nearly all scientific areas of study in recent decades. A key issue underlying the reproducibility crisis is the...

Beyond semitoric

Susan Tolman

A compact four dimensional completely integrable system f:M?R2 is semitoric if it has only non-degenerate singularities, without hyperbolic blocks, and one of the components of generates a circle action. Semitoric systems have been extensively...