no code implementations • 10 Jan 2023 • Volkan Cevher, Georgios Piliouras, Ryann Sim, Stratis Skoulakis
In this paper we present a first-order method that admits near-optimal convergence rates for convex/concave min-max problems while requiring a simple and intuitive analysis.
no code implementations • 3 Nov 2022 • Ali Kavis, Stratis Skoulakis, Kimon Antonakopoulos, Leello Tadesse Dadi, Volkan Cevher
We propose an adaptive variance-reduction method, called AdaSpider, for minimization of $L$-smooth, non-convex functions with a finite-sum structure.
no code implementations • 18 Oct 2022 • Constantinos Daskalakis, Noah Golowich, Stratis Skoulakis, Manolis Zampetakis
In particular, our method is not designed to decrease some potential function, such as the distance of its iterate from the set of local min-max equilibria or the projected gradient of the objective, but is designed to satisfy a topological property that guarantees the avoidance of cycles and implies its convergence.
no code implementations • 18 Jul 2022 • Georgios Piliouras, Lillian Ratliff, Ryann Sim, Stratis Skoulakis
The study of learning in games has thus far focused primarily on normal form games.
no code implementations • 29 Nov 2021 • Georgios Piliouras, Ryann Sim, Stratis Skoulakis
This implies that the CMWU dynamics converge with rate $O(nV \log m \log T / T)$ to a \textit{Coarse Correlated Equilibrium}.
no code implementations • NeurIPS 2021 • Tanner Fiez, Ryann Sim, Stratis Skoulakis, Georgios Piliouras, Lillian Ratliff
Classical learning results build on this theorem to show that online no-regret dynamics converge to an equilibrium in a time-average sense in zero-sum games.
no code implementations • 8 Jun 2021 • Dimitris Fotakis, Georgios Piliouras, Stratis Skoulakis
We study dynamic clustering problems from the perspective of online learning.
1 code implementation • 15 Dec 2020 • Stratis Skoulakis, Tanner Fiez, Ryann Sim, Georgios Piliouras, Lillian Ratliff
The predominant paradigm in evolutionary game theory and more generally online learning in games is based on a clear distinction between a population of dynamic agents that interact given a fixed, static game.
1 code implementation • NeurIPS 2020 • Dimitris Fotakis, Thanasis Lianeas, Georgios Piliouras, Stratis Skoulakis
We consider a natural model of online preference aggregation, where sets of preferred items $R_1, R_2, \ldots, R_t$ along with a demand for $k_t$ items in each $R_t$, appear online.
no code implementations • 21 Sep 2020 • Constantinos Daskalakis, Stratis Skoulakis, Manolis Zampetakis
In this paper, we provide a characterization of the computational complexity of the problem, as well as of the limitations of first-order methods in constrained min-max optimization problems with nonconvex-nonconcave objectives and linear constraints.
no code implementations • 26 Feb 2020 • Ioannis Panageas, Stratis Skoulakis, Antonios Varvitsiotis, Xiao Wang
Non-negative matrix factorization (NMF) is a fundamental non-convex optimization problem with numerous applications in Machine Learning (music analysis, document clustering, speech-source separation etc).