GEB will publish a special issue dedicated to the memory of Joseph Y. Halpern. With his immense energy and broad intellectual curiosity, Joe was instrumental in connecting the game theory community to a wide variety of fields including logic, multi-agent systems, distributed computing, artificial intelligence, cryptography, linguistics, and philosophy. He was the spiritus rector behind the biannual multidisciplinary TARK conferences that furthered our understanding of reasoning about rationality, knowledge, belief, and awareness. All members of the GEB community are invited to submit papers.

Topics: Befitting Joe Halpern’s wide-ranging contributions, the special issue will focus on foundational contributions to knowledge, belief, and awareness in game theory and decision theory as well as interdisciplinary work at the intersection of computer science, artificial intelligence, logic on one hand and game theory and decision theory on the other hand. Such contributions may include papers at the foundations of the theory, but also applications that help with the understanding of the foundations.

Submission and evaluation: If you would like your GEB submitted paper to be considered for publication in the special issue, you should indicate so by picking “Joseph Halpern Memorial Special Issue” as the article type and mentioning this in your cover letter. The deadline to be considered for the special issue is February 13, 2027, the first anniversary of Joe’s death.

We were all deeply saddened by the sudden death of Joseph Y. Halpern, and we hope that you participate with us in honoring him.

Sincerely yours,

The guest editors (Lawrence Blume, Yoram Moses, Rafael Pass, Burkhard Schipper)