Exercise:

EXISTS x(I) EXISTS y(I) FORALL u(I) .P(OIII) x y z(I) IMPLIES P u x x

You may not use ADVICE, but all other rules and commands are allowed.

Only book theorems may be ASSERTed as lemmas without proof.

For a complete list of book theorems, type PROBLEMS.

No more help available. Sorry.

© 1988-99, Carnegie Mellon University.