Eleventh Annual IEEE Symposium on

Logic in Computer Science (LICS 1996)

Paper: The Subtyping Problem for Second-Order Types is Undecidable (at LICS 1996)

Authors: Jerzy Tiuryn Pawel Urzyczyn


We prove that the subtyping problem induced by Mitchell's containment relation for second-order polymorphic types is undecidable. It follows that type-checking is undecidable for the polymorphic lambda-calculus extended by an appropriate subsumption rule.


    author = 	 {Jerzy Tiuryn and Pawel Urzyczyn},
    title = 	 {The Subtyping Problem for Second-Order Types is Undecidable},
    booktitle =  {Proceedings of the Eleventh Annual IEEE Symp. on Logic in Computer Science, {LICS} 1996},
    year =	 1996,
    editor =	 {Edmund M. Clarke},
    month =	 {July}, 
    pages =      {74-85},
    location =   {New Brunswick, NJ, USA}, 
    publisher =	 {IEEE Computer Society Press}