Lower bounds for MTS

We prove lower bounds for MTS on certain classes of ultrametrics

Approximation by ultrametrics

The competitive ratio for MTS is controlled by ultrametrics

Metrical task systems on a weighted star

Using the mirror descent framework for MTS

Navigating a convex body online

Continuous-time mirror descent analysis

Regret minimization and competitive analysis

Regret minimization vs. competitive analysis

tcsmath relaunch

A relaunching of tcsmath

An entropy optimal drift

Föllmer's drift, Ito's lemma, and the Gaussian log-Sobolev inequality