Current dynamic epistemic logics often become cumbersome and opaque when common knowledge is added for groups of agents. Still, postconditions regarding common knowledge express the essence of what communication achieves. We propose new systems that extend the underlying static epistemic languages in such a way that completeness proofs for the full dynamic systems can be obtained by perspicuous reduction axioms. Also, we include factual alteration, rather than just information change, which allows us to cover a much wider range of phenomena in the area of communication and change.
In REF a dynamic epistemic logic modelling effects of communication and change is introduced and extensively studied.
Logics of communication and change
Information and Computation
Chemistry Computer Science