X6004 : %THEOREM%

X6004 is a theorem.
Exercise:
EQP(O(OA)(OB)) [= x(B)] .= y(A)
All rules and commands, including ADVICE, 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.

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