Theorem elreal2 8147

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 8139	. . 3 |- RR = ( R. X. { 0R } )
2	1	eleq2i 2301	. 2 |- ( A e. RR <-> A e. ( R. X. { 0R } ) )
3		xp1st 6361	. . . 4 |- ( A e. ( R. X. { 0R } ) -> ( 1st ` A ) e. R. )
4		1st2nd2 6371	. . . . 5 |- ( A e. ( R. X. { 0R } ) -> A = <. ( 1st ` A ) , ( 2nd ` A ) >. )
5		xp2nd 6362	. . . . . . 7 |- ( A e. ( R. X. { 0R } ) -> ( 2nd ` A ) e. { 0R } )
6		elsni 3709	. . . . . . 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 3892	. . . . 5 |- ( A e. ( R. X. { 0R } ) -> <. ( 1st ` A ) , ( 2nd ` A ) >. = <. ( 1st ` A ) , 0R >. )
9	4, 8	eqtrd 2267	. . . 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 2297	. . . . 5 |- ( A = <. ( 1st ` A ) , 0R >. -> ( A e. ( R. X. { 0R } ) <-> <. ( 1st ` A ) , 0R >. e. ( R. X. { 0R } ) ) )
12		0r 8067	. . . . . . . 8 |- 0R e. R.
13	12	elexi 2828	. . . . . . 7 |- 0R e. _V
14	13	snid 3722	. . . . . 6 |- 0R e. { 0R }
15		opelxp 4781	. . . . . 6 |- ( <. ( 1st ` A ) , 0R >. e. ( R. X. { 0R } ) <-> ( ( 1st ` A ) e. R. /\ 0R e. { 0R } ) )
16	14, 15	mpbiran2 950	. . . . 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 1398   e. wcel 2205   {csn 3691   <.cop 3694   X. cxp 4749   ` cfv 5354   1stc1st 6334   2ndc2nd 6335   R.cnr 7614   0Rc0r 7615   RRcr 8128

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 619  ax-in2 620  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2207  ax-14 2208  ax-ext 2216  ax-coll 4227  ax-sep 4230  ax-nul 4238  ax-pow 4289  ax-pr 4324  ax-un 4556  ax-setind 4661  ax-iinf 4712

This theorem depends on definitions:  df-bi 117  df-dc 843  df-3or 1006  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1812  df-eu 2085  df-mo 2086  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-ne 2415  df-ral 2527  df-rex 2528  df-reu 2529  df-rab 2531  df-v 2817  df-sbc 3045  df-csb 3141  df-dif 3215  df-un 3217  df-in 3219  df-ss 3226  df-nul 3511  df-pw 3673  df-sn 3697  df-pr 3698  df-op 3700  df-uni 3917  df-int 3952  df-iun 3995  df-br 4112  df-opab 4174  df-mpt 4175  df-tr 4211  df-eprel 4412  df-id 4416  df-po 4419  df-iso 4420  df-iord 4489  df-on 4491  df-suc 4494  df-iom 4715  df-xp 4757  df-rel 4758  df-cnv 4759  df-co 4760  df-dm 4761  df-rn 4762  df-res 4763  df-ima 4764  df-iota 5314  df-fun 5356  df-fn 5357  df-f 5358  df-f1 5359  df-fo 5360  df-f1o 5361  df-fv 5362  df-ov 6055  df-oprab 6056  df-mpo 6057  df-1st 6336  df-2nd 6337  df-recs 6538  df-irdg 6603  df-1o 6649  df-oadd 6653  df-omul 6654  df-er 6769  df-ec 6771  df-qs 6775  df-ni 7621  df-pli 7622  df-mi 7623  df-lti 7624  df-plpq 7661  df-mpq 7662  df-enq 7664  df-nqqs 7665  df-plqqs 7666  df-mqqs 7667  df-1nqqs 7668  df-rq 7669  df-ltnqqs 7670  df-inp 7783  df-i1p 7784  df-enr 8043  df-nr 8044  df-0r 8048  df-r 8139

This theorem is referenced by:  ltresr2  8157  axrnegex  8196  axpre-suploclemres  8218