Eleventh Annual IEEE Symposium on

Logic in Computer Science (LICS 1996)

Paper: Reduction-free normalisation for a polymorphic system (at LICS 1996)

Authors: Thorsten Altenkirch Martin Hofmann Thomas Streicher


We give a semantical proof that every term of a combinator version of system F has a normal form. As the argument is entirely formalisable in an impredicative constructive type theory a reduction-free normalisation algorithm can be extracted from this. The proof is presented as the construction of a model of the calculus inside a category of presheaves. Its definition is given entirely in terms of the internal language.


    author = 	 {Thorsten Altenkirch and Martin Hofmann and Thomas Streicher},
    title = 	 {Reduction-free normalisation for a polymorphic system},
    booktitle =  {Proceedings of the Eleventh Annual IEEE Symp. on Logic in Computer Science, {LICS} 1996},
    year =	 1996,
    editor =	 {Edmund M. Clarke},
    month =	 {July}, 
    pages =      {98-106},
    location =   {New Brunswick, NJ, USA}, 
    publisher =	 {IEEE Computer Society Press}