Theorem elreal2 8038

Description: Ordered pair membership in the class of complex numbers. (Contributed by Mario Carneiro, 15-Jun-2013.)

Assertion

Ref	Expression
elreal2	|- ( A e. RR <-> ( ( 1st ` A ) e. R. /\ A = <. ( 1st ` A ) , 0R >. ) )

Proof of Theorem elreal2

Step	Hyp	Ref	Expression
1		df-r 8030	. . 3 |- RR = ( R. X. { 0R } )
2	1	eleq2i 2296	. 2 |- ( A e. RR <-> A e. ( R. X. { 0R } ) )
3		xp1st 6321	. . . 4 |- ( A e. ( R. X. { 0R } ) -> ( 1st ` A ) e. R. )
4		1st2nd2 6331	. . . . 5 |- ( A e. ( R. X. { 0R } ) -> A = <. ( 1st ` A ) , ( 2nd ` A ) >. )
5		xp2nd 6322	. . . . . . 7 |- ( A e. ( R. X. { 0R } ) -> ( 2nd ` A ) e. { 0R } )
6		elsni 3685	. . . . . . 7 |- ( ( 2nd ` A ) e. { 0R } -> ( 2nd ` A ) = 0R )
7	5, 6	syl 14	. . . . . 6 |- ( A e. ( R. X. { 0R } ) -> ( 2nd ` A ) = 0R )
8	7	opeq2d 3865	. . . . 5 |- ( A e. ( R. X. { 0R } ) -> <. ( 1st ` A ) , ( 2nd ` A ) >. = <. ( 1st ` A ) , 0R >. )
9	4, 8	eqtrd 2262	. . . 4 |- ( A e. ( R. X. { 0R } ) -> A = <. ( 1st ` A ) , 0R >. )
10	3, 9	jca 306	. . 3 |- ( A e. ( R. X. { 0R } ) -> ( ( 1st ` A ) e. R. /\ A = <. ( 1st ` A ) , 0R >. ) )
11		eleq1 2292	. . . . 5 |- ( A = <. ( 1st ` A ) , 0R >. -> ( A e. ( R. X. { 0R } ) <-> <. ( 1st ` A ) , 0R >. e. ( R. X. { 0R } ) ) )
12		0r 7958	. . . . . . . 8 |- 0R e. R.
13	12	elexi 2813	. . . . . . 7 |- 0R e. _V
14	13	snid 3698	. . . . . 6 |- 0R e. { 0R }
15		opelxp 4751	. . . . . 6 |- ( <. ( 1st ` A ) , 0R >. e. ( R. X. { 0R } ) <-> ( ( 1st ` A ) e. R. /\ 0R e. { 0R } ) )
16	14, 15	mpbiran2 947	. . . . 5 |- ( <. ( 1st ` A ) , 0R >. e. ( R. X. { 0R } ) <-> ( 1st ` A ) e. R. )
17	11, 16	bitrdi 196	. . . 4 |- ( A = <. ( 1st ` A ) , 0R >. -> ( A e. ( R. X. { 0R } ) <-> ( 1st ` A ) e. R. ) )
18	17	biimparc 299	. . 3 |- ( ( ( 1st ` A ) e. R. /\ A = <. ( 1st ` A ) , 0R >. ) -> A e. ( R. X. { 0R } ) )
19	10, 18	impbii 126	. 2 |- ( A e. ( R. X. { 0R } ) <-> ( ( 1st ` A ) e. R. /\ A = <. ( 1st ` A ) , 0R >. ) )
20	2, 19	bitri 184	1 |- ( A e. RR <-> ( ( 1st ` A ) e. R. /\ A = <. ( 1st ` A ) , 0R >. ) )

Syntax hints:   /\ wa 104   <-> wb 105   = wceq 1395   e. wcel 2200   {csn 3667   <.cop 3670   X. cxp 4719   ` cfv 5322   1stc1st 6294   2ndc2nd 6295   R.cnr 7505   0Rc0r 7506   RRcr 8019

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 4200  ax-sep 4203  ax-nul 4211  ax-pow 4260  ax-pr 4295  ax-un 4526  ax-setind 4631  ax-iinf 4682

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 2802  df-sbc 3030  df-csb 3126  df-dif 3200  df-un 3202  df-in 3204  df-ss 3211  df-nul 3493  df-pw 3652  df-sn 3673  df-pr 3674  df-op 3676  df-uni 3890  df-int 3925  df-iun 3968  df-br 4085  df-opab 4147  df-mpt 4148  df-tr 4184  df-eprel 4382  df-id 4386  df-po 4389  df-iso 4390  df-iord 4459  df-on 4461  df-suc 4464  df-iom 4685  df-xp 4727  df-rel 4728  df-cnv 4729  df-co 4730  df-dm 4731  df-rn 4732  df-res 4733  df-ima 4734  df-iota 5282  df-fun 5324  df-fn 5325  df-f 5326  df-f1 5327  df-fo 5328  df-f1o 5329  df-fv 5330  df-ov 6014  df-oprab 6015  df-mpo 6016  df-1st 6296  df-2nd 6297  df-recs 6464  df-irdg 6529  df-1o 6575  df-oadd 6579  df-omul 6580  df-er 6695  df-ec 6697  df-qs 6701  df-ni 7512  df-pli 7513  df-mi 7514  df-lti 7515  df-plpq 7552  df-mpq 7553  df-enq 7555  df-nqqs 7556  df-plqqs 7557  df-mqqs 7558  df-1nqqs 7559  df-rq 7560  df-ltnqqs 7561  df-inp 7674  df-i1p 7675  df-enr 7934  df-nr 7935  df-0r 7939  df-r 8030

This theorem is referenced by:  ltresr2  8048  axrnegex  8087  axpre-suploclemres  8109