247 citations · 1.8k across the 152 of their papers we have counts for
6 papers · 1 filter
Weighted Sets of Probabilities and MinimaxWeighted Expected Regret: New Approaches for Representing Uncertainty and Making Decisions
Joseph Y. Halpern, Samantha Leung
We consider a setting where an agent's uncertainty is represented by a set of probability measures, rather than a single measure. Measure-bymeasure updating of such a set of measur…
Proceedings of the Twentieth Conference on Uncertainty in Artificial Intelligence (2004)
Max Chickering, Joseph Halpern
This is the Proceedings of the Twentieth Conference on Uncertainty in Artificial Intelligence, which was held in Banff, Canada, July 7 - 11 2004.
Optimizing Scrip Systems: Crashes, Altruists, Hoarders, Sybils and Collusion
Ian A. Kash, Eric J. Friedman, Joseph Y. Halpern
Scrip, or artificial currency, is a useful tool for designing systems that are robust to selfish behavior by users. However, it also introduces problems for a system designer, such…
An Equilibrium Analysis of Scrip Systems
Ian A. Kash, Eric J. Friedman, Joseph Y. Halpern
A game-theoretic model of scrip (artificial currency) systems is analyzed. It is shown that relative entropy can be used to characterize the distribution of agent wealth when all a…
Alternating register automata on finite words and trees
Diego Figueira
We study alternating register automata on data words and data trees in relation to logics. A data word (resp. data tree) is a word (resp. tree) whose every position carries a label…
Ambiguous Language and Differences in Beliefs
Joseph Y. Halpern, Willemien Kets
Standard models of multi-agent modal logic do not capture the fact that information is often ambiguous, and may be interpreted in different ways by different agents. We propose a f…