EQUIV-EQ-CONTR : IRULEDEF

EQUIV-EQ-CONTR is an intermediate rule definition.
(P1) H !`(INSTANTIATE-TOP-EQUALITY A(O))
*(P2) H !A(O) Equiv-eq: P1
Transformation: (P2 ss) ==> (P1 ss)

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EQUIV-EQ-CONTR : MEXPR

EQUIV-EQ-CONTR is a top-level command.
Rule to contract the outermost instance of the Leibniz definition of
equality into instances of the symbol = .
The command format for EQUIV-EQ-CONTR is:

 <n>EQUIV-EQ-CONTR   P2   P1    A INSTANTIATE-TOP-EQUALITY   P2-HYPS    P1-HYPS 
"LINE" "LINE" "GWFF" "GWFF" "LINELIST" "LINELIST"


The arguments have the following meaning:
P2 : Line in = form
P1 : Line in Leibniz form
A : Wff with = symbols
INSTANTIATE-TOP-EQUALITY : Expanded wff
P2-HYPS : Hypotheses
P1-HYPS : Hypotheses

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EQUIV-EQ-CONTR : SRULE

EQUIV-EQ-CONTR is an inference rule.
Its priority is 5

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