[FOM] Adventures in Formalization
Timothy Y. Chow
tchow at alum.mit.edu
Thu Sep 17 13:24:23 EDT 2015
Larry Paulson wrote:
> A great many formalisms are used at present. Higher-order logic (used in
> HOL Light and HOL4) is of course much weaker than ZFC, but seems to be
> good enough for large chunks of analysis. A great many constructive type
> theories are used, above all in Coq; unfortunately I have no clear idea
> how the strength of such formalisms compares with that of ZFC.
I think that this is an important and fundamental question, and not just
for die-hard fans of ZFC like Friedman. The one paper that I'm aware of
that addresses it is "Sets in Coq, Coq in Sets" by Bruno Barras.
http://jfr.unibo.it/article/view/1695/1316
Tim
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