Canonicity in power and modal logics of finite achronal width

Published 26 Jul 2022 in math.LO and cs.LO | (2207.12596v1)

Abstract: We develop a method for showing that various modal logics that are valid in their countably generated canonical Kripke frames must also be valid in their uncountably generated ones. This is applied to many systems, including the logics of finite width, and a broader class of multimodal logics of `finite achronal width' that are introduced here.

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