Theorem caov12 6210

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
caov12	|- ( A F ( B F C ) ) = ( B F ( A F C ) )

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

Proof of Theorem caov12

Step	Hyp	Ref	Expression
1		caov.1	. . . 4 |- A e. _V
2		caov.2	. . . 4 |- B e. _V
3		caov.com	. . . 4 |- ( x F y ) = ( y F x )
4	1, 2, 3	caovcom 6179	. . 3 |- ( A F B ) = ( B F A )
5	4	oveq1i 6027	. 2 |- ( ( A F B ) F C ) = ( ( B F A ) F C )
6		caov.3	. . 3 |- C e. _V
7		caov.ass	. . 3 |- ( ( x F y ) F z ) = ( x F ( y F z ) )
8	1, 2, 6, 7	caovass 6182	. 2 |- ( ( A F B ) F C ) = ( A F ( B F C ) )
9	2, 1, 6, 7	caovass 6182	. 2 |- ( ( B F A ) F C ) = ( B F ( A F C ) )
10	5, 8, 9	3eqtr3i 2260	1 |- ( A F ( B F C ) ) = ( B F ( A F C ) )

Syntax hints:   = wceq 1397   e. wcel 2202   _Vcvv 2802  (class class class)co 6017

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 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-ext 2213

This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ral 2515  df-rex 2516  df-v 2804  df-un 3204  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-br 4089  df-iota 5286  df-fv 5334  df-ov 6020

This theorem is referenced by:  caov31  6211