Theorem addcomi 8101

Description: Addition commutes. Based on ideas by Eric Schmidt. (Contributed by Scott Fenton, 3-Jan-2013.)

Hypotheses

Ref	Expression
mul.1	|- A e. CC
mul.2	|- B e. CC

Assertion

Ref	Expression
addcomi	|- ( A + B ) = ( B + A )

Proof of Theorem addcomi

Step	Hyp	Ref	Expression
1		mul.1	. 2 |- A e. CC
2		mul.2	. 2 |- B e. CC
3		addcom 8094	. 2 |- ( ( A e. CC /\ B e. CC ) -> ( A + B ) = ( B + A ) )
4	1, 2, 3	mp2an 426	1 |- ( A + B ) = ( B + A )

Syntax hints:   = wceq 1353   e. wcel 2148  (class class class)co 5875   CCcc 7809   + caddc 7814

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia3 108  ax-addcom 7911

This theorem is referenced by:  addcomli  8102  add42i  8123  mvlladdi  8175  3m1e2  9039  fztpval  10083  fzo0to42pr  10220  ef01bndlem  11764  tangtx  14262  lgsdir2lem2  14433  lgsdir2lem3  14434  lgsdir2lem5  14436