Theorem oveq2 91

Description: Equality theorem for binary operation.

Hypotheses

Ref	Expression
oveq.1	|- F:(al -> (be -> ga))
oveq.2	|- A:al
oveq.3	|- B:be
oveq2.4	|- R |= [B = T]

Assertion

Ref	Expression
oveq2	|- R |= [[AFB] = [AFT]]

Proof of Theorem oveq2

Step	Hyp	Ref	Expression
1		oveq.1	. 2 |- F:(al -> (be -> ga))
2		oveq.2	. 2 |- A:al
3		oveq.3	. 2 |- B:be
4		oveq2.4	. . . 4 |- R |= [B = T]
5	4	ax-cb1 29	. . 3 |- R:*
6	5, 2	eqid 73	. 2 |- R |= [A = A]
7	1, 2, 3, 6, 4	oveq12 90	1 |- R |= [[AFB] = [AFT]]

Syntax hints:   -> ht 2   = ke 7  [kbr 9   |= wffMMJ2 11  wffMMJ2t 12

This theorem was proved from axioms:  ax-syl 15  ax-jca 17  ax-trud 26  ax-cb1 29  ax-cb2 30  ax-refl 39  ax-eqmp 42  ax-ceq 46

This theorem depends on definitions:  df-ov 65

This theorem is referenced by:  imval  136  orval  137  anval  138  ecase  153  exlimdv2  156  exlimd  171  axpow  208  axun  209