Search Results for author: Kostas Kollias

Found 8 papers, 2 papers with code

When Are Two Lists Better than One?: Benefits and Harms in Joint Decision-making

1 code implementation22 Aug 2023 Kate Donahue, Sreenivas Gollapudi, Kostas Kollias

Surprisingly, we show that for multiple of noise models, it is optimal to set $k \in [2, n-1]$ - that is, there are strict benefits to collaborating, even when the human and algorithm have equal accuracy separately.

Decision Making

Congested Bandits: Optimal Routing via Short-term Resets

no code implementations23 Jan 2023 Pranjal Awasthi, Kush Bhatia, Sreenivas Gollapudi, Kostas Kollias

For the linear contextual bandit setup, our algorithm, based on an iterative least squares planner, achieves policy regret $\tilde{O}(\sqrt{dT} + \Delta)$.

Online Learning and Bandits with Queried Hints

no code implementations4 Nov 2022 Aditya Bhaskara, Sreenivas Gollapudi, Sungjin Im, Kostas Kollias, Kamesh Munagala

For stochastic MAB, we also consider a stronger model where a probe reveals the reward values of the probed arms, and show that in this case, $k=3$ probes suffice to achieve parameter-independent constant regret, $O(n^2)$.

Machine-Learned Prediction Equilibrium for Dynamic Traffic Assignment

1 code implementation14 Sep 2021 Lukas Graf, Tobias Harks, Kostas Kollias, Michael Markl

We study a dynamic traffic assignment model, where agents base their instantaneous routing decisions on real-time delay predictions.

Online Learning under Adversarial Corruptions

no code implementations1 Jan 2021 Pranjal Awasthi, Sreenivas Gollapudi, Kostas Kollias, Apaar Sadhwani

We study the design of efficient online learning algorithms tolerant to adversarially corrupted rewards.

Multi-Armed Bandits

Robust Learning for Congestion-Aware Routing

no code implementations1 Jan 2021 Sreenivas Gollapudi, Kostas Kollias, Benjamin Plaut, Ameya Velingker

We consider the problem of routing users through a network with unknown congestion functions over an infinite time horizon.

valid

Adaptive Probing Policies for Shortest Path Routing

no code implementations NeurIPS 2020 Aditya Bhaskara, Sreenivas Gollapudi, Kostas Kollias, Kamesh Munagala

Inspired by traffic routing applications, we consider the problem of finding the shortest path from a source $s$ to a destination $t$ in a graph, when the lengths of the edges are unknown.

Cannot find the paper you are looking for? You can Submit a new open access paper.