3 papers
cs.LG2026
Safety by Design: Realized-Cost Constraints for Contextual Bandits with Continuous Actions
Spyros Dragazis, Aldo Pacchiano
Contextual bandits are a standard framework for sequential decision-making under uncertainty, with applications in clinical trials, dosage selection, recommendation systems, and au…
cs.DS2025
Estimating Hitting Times Locally At Scale
Themistoklis Haris, Fabian Spaeh, Spyros Dragazis +1
Hitting times provide a fundamental measure of distance in random processes, quantifying the expected number of steps for a random walk starting at node to reach node . They…
cs.LG2025
The Good, the Bad, and the Sampled: a No-Regret Approach to Safe Online Classification
Tavor Z. Baharav, Spyros Dragazis, Aldo Pacchiano
We study sequential testing for a binary disease outcome when risk follows an unknown logistic model. At each round, the decision maker may either pay for a test revealing the true…