Skip to yearly menu bar Skip to main content


Poster

Fully Unconstrained Online Learning

Ashok Cutkosky · Zak Mhammedi

East Exhibit Hall A-C #4703
[ ]
Wed 11 Dec 4:30 p.m. PST — 7:30 p.m. PST

Abstract: We provide a technique for OLO that obtains regret $G\|w_\star\|\sqrt{T\log(\|w_\star\|G\sqrt{T})} + \|w_\star\|^2 + G^2$ on $G$-Lipschitz losses for any comparison point $w_\star$ without knowing either $G$ or $\|w_\star\|$. Importantly, this matches the optimal bound $G\|w_\star\|\sqrt{T}$ available with such knowledge (up to logarithmic factors), unless either $\|w_\star\|$ or $G$ is so large that even $G\|w_\star\|\sqrt{T}$ is roughly linear in $T$. Thus, at a high level it matches the optimal bound in all cases in which one can achieve sublinear regret.

Live content is unavailable. Log in and register to view live content