Theorem caovord2 6252

Description: Operation ordering law with commuted arguments. (Contributed by NM, 27-Feb-1996.)

Hypotheses

Ref	Expression
caovord.1	|- A e. _V
caovord.2	|- B e. _V
caovord.3	|- ( z e. S -> ( x R y <-> ( z F x ) R ( z F y ) ) )
caovord2.3	|- C e. _V
caovord2.com	|- ( x F y ) = ( y F x )

Assertion

Ref	Expression
caovord2	|- ( C e. S -> ( A R B <-> ( A F C ) R ( B F C ) ) )

Distinct variable groups:   x, y, z, A   x, B, y, z   x, C, y, z   x, F, y, z   x, R, y, z   x, S, y, z

Proof of Theorem caovord2

Step	Hyp	Ref	Expression
1		caovord.1	. . 3 |- A e. _V
2		caovord.2	. . 3 |- B e. _V
3		caovord.3	. . 3 |- ( z e. S -> ( x R y <-> ( z F x ) R ( z F y ) ) )
4	1, 2, 3	caovord 6251	. 2 |- ( C e. S -> ( A R B <-> ( C F A ) R ( C F B ) ) )
5		caovord2.3	. . . 4 |- C e. _V
6		caovord2.com	. . . 4 |- ( x F y ) = ( y F x )
7	5, 1, 6	caovcom 6237	. . 3 |- ( C F A ) = ( A F C )
8	5, 2, 6	caovcom 6237	. . 3 |- ( C F B ) = ( B F C )
9	7, 8	breq12i 4134	. 2 |- ( ( C F A ) R ( C F B ) <-> ( A F C ) R ( B F C ) )
10	4, 9	bitrdi 196	1 |- ( C e. S -> ( A R B <-> ( A F C ) R ( B F C ) ) )

Syntax hints:   -> wi 4   <-> wb 105   = wceq 1402   e. wcel 2209   _Vcvv 2821   class class class wbr 4125  (class class class)co 6075

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-ext 2220

This theorem depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ral 2533  df-rex 2534  df-v 2823  df-un 3224  df-sn 3711  df-pr 3712  df-op 3714  df-uni 3931  df-br 4126  df-iota 5332  df-fv 5380  df-ov 6078

This theorem is referenced by:  caovord3  6253