The qualified converse Barcan formula, an axiom of quantified modal logic. See "Completeness for quantified modal logic" in the lecture notes for more information. (Image by MIT OpenCourseWare.)
Prof. Robert Stalnaker
24.244
Fall 2009
Undergraduate
This course covers sentential and quantified modal logic, with emphasis on the model theory ("possible worlds semantics"). Topics include soundness, completeness, characterization results for alternative systems, sense and dynamic logics, epistemic logics, as well as logics of necessity and possibility. Course material applies to philosophy, theoretical computer science, and linguistics.