Theorem ax0id 8076

Description: 0 is an identity element for real addition. Axiom for real and complex numbers, derived from set theory. This construction-dependent theorem should not be referenced directly; instead, use ax-0id 8118.

In the Metamath Proof Explorer this is not a complex number axiom but is instead proved from other axioms. That proof relies on excluded middle and it is not known whether it is possible to prove this from the other axioms without excluded middle. (Contributed by Jim Kingdon, 16-Jan-2020.) (New usage is discouraged.)

Assertion

Ref	Expression
ax0id	|- ( A e. CC -> ( A + 0 ) = A )

Proof of Theorem ax0id

Dummy variables x y are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		df-c 8016	. 2 |- CC = ( R. X. R. )
2		oveq1 6014	. . 3 |- ( <. x , y >. = A -> ( <. x , y >. + 0 ) = ( A + 0 ) )
3		id 19	. . 3 |- ( <. x , y >. = A -> <. x , y >. = A )
4	2, 3	eqeq12d 2244	. 2 |- ( <. x , y >. = A -> ( ( <. x , y >. + 0 ) = <. x , y >. <-> ( A + 0 ) = A ) )
5		0r 7948	. . . 4 |- 0R e. R.
6		addcnsr 8032	. . . 4 |- ( ( ( x e. R. /\ y e. R. ) /\ ( 0R e. R. /\ 0R e. R. ) ) -> ( <. x , y >. + <. 0R , 0R >. ) = <. ( x +R 0R ) , ( y +R 0R ) >. )
7	5, 5, 6	mpanr12 439	. . 3 |- ( ( x e. R. /\ y e. R. ) -> ( <. x , y >. + <. 0R , 0R >. ) = <. ( x +R 0R ) , ( y +R 0R ) >. )
8		df-0 8017	. . . . . 6 |- 0 = <. 0R , 0R >.
9	8	eqcomi 2233	. . . . 5 |- <. 0R , 0R >. = 0
10	9	a1i 9	. . . 4 |- ( ( x e. R. /\ y e. R. ) -> <. 0R , 0R >. = 0 )
11	10	oveq2d 6023	. . 3 |- ( ( x e. R. /\ y e. R. ) -> ( <. x , y >. + <. 0R , 0R >. ) = ( <. x , y >. + 0 ) )
12		0idsr 7965	. . . . 5 |- ( x e. R. -> ( x +R 0R ) = x )
13	12	adantr 276	. . . 4 |- ( ( x e. R. /\ y e. R. ) -> ( x +R 0R ) = x )
14		0idsr 7965	. . . . 5 |- ( y e. R. -> ( y +R 0R ) = y )
15	14	adantl 277	. . . 4 |- ( ( x e. R. /\ y e. R. ) -> ( y +R 0R ) = y )
16	13, 15	opeq12d 3865	. . 3 |- ( ( x e. R. /\ y e. R. ) -> <. ( x +R 0R ) , ( y +R 0R ) >. = <. x , y >. )
17	7, 11, 16	3eqtr3d 2270	. 2 |- ( ( x e. R. /\ y e. R. ) -> ( <. x , y >. + 0 ) = <. x , y >. )
18	1, 4, 17	optocl 4795	1 |- ( A e. CC -> ( A + 0 ) = A )

Syntax hints:   -> wi 4   /\ wa 104   = wceq 1395   e. wcel 2200   <.cop 3669  (class class class)co 6007   R.cnr 7495   0Rc0r 7496   +R cplr 7499   CCcc 8008   0cc0 8010   + caddc 8013

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-in1 617  ax-in2 618  ax-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-13 2202  ax-14 2203  ax-ext 2211  ax-coll 4199  ax-sep 4202  ax-nul 4210  ax-pow 4258  ax-pr 4293  ax-un 4524  ax-setind 4629  ax-iinf 4680

This theorem depends on definitions:  df-bi 117  df-dc 840  df-3or 1003  df-3an 1004  df-tru 1398  df-fal 1401  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ne 2401  df-ral 2513  df-rex 2514  df-reu 2515  df-rab 2517  df-v 2801  df-sbc 3029  df-csb 3125  df-dif 3199  df-un 3201  df-in 3203  df-ss 3210  df-nul 3492  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3889  df-int 3924  df-iun 3967  df-br 4084  df-opab 4146  df-mpt 4147  df-tr 4183  df-eprel 4380  df-id 4384  df-po 4387  df-iso 4388  df-iord 4457  df-on 4459  df-suc 4462  df-iom 4683  df-xp 4725  df-rel 4726  df-cnv 4727  df-co 4728  df-dm 4729  df-rn 4730  df-res 4731  df-ima 4732  df-iota 5278  df-fun 5320  df-fn 5321  df-f 5322  df-f1 5323  df-fo 5324  df-f1o 5325  df-fv 5326  df-ov 6010  df-oprab 6011  df-mpo 6012  df-1st 6292  df-2nd 6293  df-recs 6457  df-irdg 6522  df-1o 6568  df-2o 6569  df-oadd 6572  df-omul 6573  df-er 6688  df-ec 6690  df-qs 6694  df-ni 7502  df-pli 7503  df-mi 7504  df-lti 7505  df-plpq 7542  df-mpq 7543  df-enq 7545  df-nqqs 7546  df-plqqs 7547  df-mqqs 7548  df-1nqqs 7549  df-rq 7550  df-ltnqqs 7551  df-enq0 7622  df-nq0 7623  df-0nq0 7624  df-plq0 7625  df-mq0 7626  df-inp 7664  df-i1p 7665  df-iplp 7666  df-enr 7924  df-nr 7925  df-plr 7926  df-0r 7929  df-c 8016  df-0 8017  df-add 8021

This theorem is referenced by: (None)