9 citations · 18 across the 7 of their papers we have counts for
7 papers
LAReQA: Language-agnostic answer retrieval from a multilingual pool
Uma Roy, Noah Constant, Rami Al-Rfou +3
We present LAReQA, a challenging new benchmark for language-agnostic answer retrieval from a multilingual candidate pool. Unlike previous cross-lingual tasks, LAReQA tests for "str…
Covariance Matrix Estimation under Total Positivity for Portfolio Selection
Raj Agrawal, Uma Roy, Caroline Uhler
Selecting the optimal Markowitz porfolio depends on estimating the covariance matrix of the returns of assets from periods of historical data. Problematically, is typic…
Learning High-dimensional Gaussian Graphical Models under Total Positivity without Adjustment of Tuning Parameters
Yuhao Wang, Uma Roy, Caroline Uhler
We consider the problem of estimating an undirected Gaussian graphical model when the underlying distribution is multivariate totally positive of order 2 (MTP2), a strong form of p…
Online Multi-Armed Bandit
Uma Roy, Ashwath Thirmulai, Joe Zurier
We introduce a novel variant of the multi-armed bandit problem, in which bandits are streamed one at a time to the player, and at each point, the player can either choose to pull t…
An Explicit Description of the B(\infty) Crystal For Generalized Quantum Groups of a Family of Comet Quivers
Uma Roy, Seth Shelley-Abrahamson
Tristan Bozec gave a definition of generalized quantum groups that extends the usual definition of quantum groups to finite quivers with loops at vertices, and he introduced a theo…
Diagrammatic Calculus of Coxeter and Braid Groups
Niket Gowravaram, Uma Roy
We investigate a novel diagrammatic approach to examining strict actions of a Coxeter group or a braid group on a category. This diagrammatic language, which was developed in a ser…