Theorem caov32 6085

Description: Rearrange arguments in a commutative, associative operation. (Contributed by NM, 26-Aug-1995.)

Hypotheses

Ref	Expression
caov.1	|- A e. _V
caov.2	|- B e. _V
caov.3	|- C e. _V
caov.com	|- ( x F y ) = ( y F x )
caov.ass	|- ( ( x F y ) F z ) = ( x F ( y F z ) )

Assertion

Ref	Expression
caov32	|- ( ( A F B ) F C ) = ( ( A F C ) F B )

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

Proof of Theorem caov32

Step	Hyp	Ref	Expression
1		caov.2	. . . 4 |- B e. _V
2		caov.3	. . . 4 |- C e. _V
3		caov.com	. . . 4 |- ( x F y ) = ( y F x )
4	1, 2, 3	caovcom 6055	. . 3 |- ( B F C ) = ( C F B )
5	4	oveq2i 5908	. 2 |- ( A F ( B F C ) ) = ( A F ( C F B ) )
6		caov.1	. . 3 |- A e. _V
7		caov.ass	. . 3 |- ( ( x F y ) F z ) = ( x F ( y F z ) )
8	6, 1, 2, 7	caovass 6058	. 2 |- ( ( A F B ) F C ) = ( A F ( B F C ) )
9	6, 2, 1, 7	caovass 6058	. 2 |- ( ( A F C ) F B ) = ( A F ( C F B ) )
10	5, 8, 9	3eqtr4i 2220	1 |- ( ( A F B ) F C ) = ( ( A F C ) F B )

Syntax hints:   = wceq 1364   e. wcel 2160   _Vcvv 2752  (class class class)co 5897

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 710  ax-5 1458  ax-7 1459  ax-gen 1460  ax-ie1 1504  ax-ie2 1505  ax-8 1515  ax-10 1516  ax-11 1517  ax-i12 1518  ax-bndl 1520  ax-4 1521  ax-17 1537  ax-i9 1541  ax-ial 1545  ax-i5r 1546  ax-ext 2171

This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1367  df-nf 1472  df-sb 1774  df-clab 2176  df-cleq 2182  df-clel 2185  df-nfc 2321  df-ral 2473  df-rex 2474  df-v 2754  df-un 3148  df-sn 3613  df-pr 3614  df-op 3616  df-uni 3825  df-br 4019  df-iota 5196  df-fv 5243  df-ov 5900

This theorem is referenced by:  caov31  6087