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Listen "Introduction to Observational Type Theory"
Episode Synopsis
In this episode, I introduce an important paper by Pujet and Tabareau, titled "Observational Equality: Now for Good", that develops earlier work of McBride, Swierstra, and Altenkirch (which I will cover in a later episode) on a new approach to making a type theory extensional. The idea is to have equality types reduce, within the theory, to statements of extensional equality for the type of the values being equated.
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