X2114 : %THEOREM%X2114 is a theorem.
FORALL x(I) R(OII) x b(I) AND FORALL y(I) [EXISTS z(I) R y z IMPLIES R a(I) y] IMPLIES EXISTS u(I) FORALL v(I) R u v
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.
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