Nuprl


Nuprl

/nyu p*rl/ Nearly Ultimate PRL.

A system for interactive creation of formal mathematics,including definitions and proofs. It has an extremely richtype system, including dependent functions, products, sets,quotients and universes. Types are first-class citizens.It is built on Franz Lisp and Edinburgh ML.

["Implementing Mathematics in the Nuprl Proof DevelopmentSystem", R.L. Constable et al, P-H 1986].