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Themistoklis Gouleakis

4 accepted papers

2025

Improved Bounds for Online Facility Location with Predictions

AAAI 2025technical

We consider the Online Facility Location (OFL) problem in the framework of learning-augmented online algorithms. In Online Facility Location (OFL), demands arrive one-by-one in a metric space and must be (irrevocably) assigned to an open facility upon arrival, without any knowledge about future dema…

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2024

Online bipartite matching with imperfect advice

ICML 2024poster

We study the problem of online unweighted bipartite matching with $n$ offline vertices and $n$ online vertices where one wishes to be competitive against the optimal offline algorithm. While the classic RANKING algorithm of (Karp et al., 1990) provably attains competitive ratio of $1-1/e > 1/2$, we…

2023

Learning-Augmented Algorithms for Online TSP on the Line

AAAI 2023technical

We study the online Traveling Salesman Problem (TSP) on the line augmented with machine-learned predictions. In the classical problem, there is a stream of requests released over time along the real line. The goal is to minimize the makespan of the algorithm. We distinguish between the open variant…

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