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Discriminating Lambda-Terms Using Clocked Boehm Trees

Joerg Endrullis ; Dimitri Hendriks ; Jan Willem Klop ; Andrew Polonsky.

As observed by Intrigila, there are hardly techniques available in the lambda-calculus to prove that two lambda-terms are not beta-convertible. Techniques employing the usual Boehm Trees are inadequate when we deal with terms having the same Boehm Tree (BT). This is the case in particular for fixed&nbsp;[&hellip;]

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On sets of terms having a given intersection type

Andrew Polonsky ; Richard Statman.

Working in a variant of the intersection type assignment system of Coppo, Dezani-Ciancaglini and Venneri [1981], we prove several facts about sets of terms having a given intersection type. Our main result is that every strongly normalizing term M admits a *uniqueness typing*, which is a pair&nbsp;[&hellip;]

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