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Extensional equality in the classical theory of types
pp. 219-234
Résumé
The classical theory of types in question is essentially the theory of Martin-Löf [1] but with the law of double negation elimination. I am ultimately interested in the theory of types as a framework for the foundations of mathematics and, for this purpose, we need to consider extensions of the theory obtained by adding "well-ordered types,' for example the type N of the finite ordinals; but the unextended theory will suffice to illustrate the treatment of extensional equality.
Détails de la publication
Publié dans:
Depauli Schimanovich Werner, Köhler Eckehart, Stadler Friedrich (1995) The foundational debate: complexity and constructivity in mathematics and physics. Dordrecht, Springer.
Pages: 219-234
DOI: 10.1007/978-94-017-3327-4_17
Citation complète:
Tait William W., 1995, Extensional equality in the classical theory of types. In W. Depauli Schimanovich, E. Köhler & F. Stadler (eds.) The foundational debate (219-234). Dordrecht, Springer.