{"paper":{"title":"A Logic for Global and Local Announcements","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.AI"],"primary_cat":"cs.LO","authors_text":"France), Francesco Belardinelli (Labortoire IBISC, Hans van Ditmarsch (LORIA \\^A-- CNRS, IRIT Toulouse), Liverpool, UEVE, UK), Universit\\'e de Lorraine, University of Liverpool, Vandoeuvre-l\\`es-Nancy, Wiebe van der Hoek (Department of Computing","submitted_at":"2017-07-27T07:45:23Z","abstract_excerpt":"In this paper we introduce {\\em global and local announcement logic} (GLAL), a dynamic epistemic logic with two distinct announcement operators -- $[\\phi]^+_A$ and $[\\phi]^-_A$ indexed to a subset $A$ of the set $Ag$ of all agents -- for global and local announcements respectively. The boundary case $[\\phi]^+_{Ag}$ corresponds to the public announcement of $\\phi$, as known from the literature. Unlike standard public announcements, which are {\\em model transformers}, the global and local announcements are {\\em pointed model transformers}. In particular, the update induced by the announcement ma"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.08735","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}