%0 Journal Article %T Symmetries in Modal Logics %A Carlos Areces %A Guillaume Hoffmann %A Ezequiel Orbe %J Electronic Proceedings in Theoretical Computer Science %D 2013 %I Open Publishing Association %R 10.4204/eptcs.113.6 %X We generalize the notion of symmetries of propositional formulas in conjunctive normal form to modal formulas. Our framework uses the coinductive models and, hence, the results apply to a wide class of modal logics including, for example, hybrid logics. Our main result shows that the symmetries of a modal formula preserve entailment. %U http://arxiv.org/pdf/1303.7327v1