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Knowing Values and Public Inspection

Part of the Lecture Notes in Computer Science book series (LNTCS,volume 10119)


We present a basic dynamic epistemic logic of “knowing the value”. Analogous to public announcement in standard DEL, we study “public inspection”, a new dynamic operator which updates the agents’ knowledge about the values of constants. We provide a sound and strongly complete axiomatization for the single and multi-agent case, making use of the well-known Armstrong axioms for dependencies in databases.


  • Knowing what
  • Bisimulation
  • Public announcement logic

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Fig. 1.


  1. 1.

    In this paper, by constant we mean something which has a single value given the actual situation. The range of possible values of a constant may be infinite. This terminology is motivated by first-order modal logic as it will become more clear later.


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We thank the following people for useful comments on this work: Alexandru Baltag, Peter van Emde Boas, Hans van Ditmarsch, Jie Fan, Kai Li and our anonymous reviewers.

This research cooperation was made possible by travel grant 040.11.490 from NWO for Yanjing Wang, which is herewith gratefully acknowledged.

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Correspondence to Malvin Gattinger .

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van Eijck, J., Gattinger, M., Wang, Y. (2017). Knowing Values and Public Inspection. In: Ghosh, S., Prasad, S. (eds) Logic and Its Applications. ICLA 2017. Lecture Notes in Computer Science(), vol 10119. Springer, Berlin, Heidelberg.

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