%0 Conference Proceedings %T Internal Models for Coalgebraic Modal Logics %+ University of Southampton %A Wilkinson, Toby %< avec comité de lecture %( Lecture Notes in Computer Science %B 11th International Workshop on Coalgebraic Methods in Computer Science (CMCS) %C Tallinn, Estonia %Y Dirk Pattinson %Y Lutz Schröder %I Springer %3 Coalgebraic Methods in Computer Science %V LNCS-7399 %P 238-258 %8 2012-03-31 %D 2012 %R 10.1007/978-3-642-32784-1_13 %K Coalgebra %K Modal Logic %K Dual Adjunction %K Expressivity %Z Computer Science [cs]Conference papers %X We present ongoing work into the systematic study of the use of dual adjunctions in coalgebraic modal logic. We introduce a category of internal models for a modal logic. These are constructed from syntax, and yield a generalised notion of canonical model. Further, expressivity of a modal logic is shown to be characterised by factorisation of its models via internal models and the existence of cospans of internal models. %G English %2 https://inria.hal.science/hal-01539883/document %2 https://inria.hal.science/hal-01539883/file/978-3-642-32784-1_13_Chapter.pdf %L hal-01539883 %U https://inria.hal.science/hal-01539883 %~ IFIP-LNCS %~ IFIP %~ IFIP-CMCS %~ IFIP-LNCS-7399 %~ IFIP-ETAPS