Theorem elreal2 8049

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 8041	. . 3 |- RR = ( R. X. { 0R } )
2	1	eleq2i 2298	. 2 |- ( A e. RR <-> A e. ( R. X. { 0R } ) )
3		xp1st 6327	. . . 4 |- ( A e. ( R. X. { 0R } ) -> ( 1st ` A ) e. R. )
4		1st2nd2 6337	. . . . 5 |- ( A e. ( R. X. { 0R } ) -> A = <. ( 1st ` A ) , ( 2nd ` A ) >. )
5		xp2nd 6328	. . . . . . 7 |- ( A e. ( R. X. { 0R } ) -> ( 2nd ` A ) e. { 0R } )
6		elsni 3687	. . . . . . 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 3869	. . . . 5 |- ( A e. ( R. X. { 0R } ) -> <. ( 1st ` A ) , ( 2nd ` A ) >. = <. ( 1st ` A ) , 0R >. )
9	4, 8	eqtrd 2264	. . . 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 2294	. . . . 5 |- ( A = <. ( 1st ` A ) , 0R >. -> ( A e. ( R. X. { 0R } ) <-> <. ( 1st ` A ) , 0R >. e. ( R. X. { 0R } ) ) )
12		0r 7969	. . . . . . . 8 |- 0R e. R.
13	12	elexi 2815	. . . . . . 7 |- 0R e. _V
14	13	snid 3700	. . . . . 6 |- 0R e. { 0R }
15		opelxp 4755	. . . . . 6 |- ( <. ( 1st ` A ) , 0R >. e. ( R. X. { 0R } ) <-> ( ( 1st ` A ) e. R. /\ 0R e. { 0R } ) )
16	14, 15	mpbiran2 949	. . . . 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 1397   e. wcel 2202   {csn 3669   <.cop 3672   X. cxp 4723   ` cfv 5326   1stc1st 6300   2ndc2nd 6301   R.cnr 7516   0Rc0r 7517   RRcr 8030

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 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-13 2204  ax-14 2205  ax-ext 2213  ax-coll 4204  ax-sep 4207  ax-nul 4215  ax-pow 4264  ax-pr 4299  ax-un 4530  ax-setind 4635  ax-iinf 4686

This theorem depends on definitions:  df-bi 117  df-dc 842  df-3or 1005  df-3an 1006  df-tru 1400  df-fal 1403  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ne 2403  df-ral 2515  df-rex 2516  df-reu 2517  df-rab 2519  df-v 2804  df-sbc 3032  df-csb 3128  df-dif 3202  df-un 3204  df-in 3206  df-ss 3213  df-nul 3495  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-int 3929  df-iun 3972  df-br 4089  df-opab 4151  df-mpt 4152  df-tr 4188  df-eprel 4386  df-id 4390  df-po 4393  df-iso 4394  df-iord 4463  df-on 4465  df-suc 4468  df-iom 4689  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-rn 4736  df-res 4737  df-ima 4738  df-iota 5286  df-fun 5328  df-fn 5329  df-f 5330  df-f1 5331  df-fo 5332  df-f1o 5333  df-fv 5334  df-ov 6020  df-oprab 6021  df-mpo 6022  df-1st 6302  df-2nd 6303  df-recs 6470  df-irdg 6535  df-1o 6581  df-oadd 6585  df-omul 6586  df-er 6701  df-ec 6703  df-qs 6707  df-ni 7523  df-pli 7524  df-mi 7525  df-lti 7526  df-plpq 7563  df-mpq 7564  df-enq 7566  df-nqqs 7567  df-plqqs 7568  df-mqqs 7569  df-1nqqs 7570  df-rq 7571  df-ltnqqs 7572  df-inp 7685  df-i1p 7686  df-enr 7945  df-nr 7946  df-0r 7950  df-r 8041

This theorem is referenced by:  ltresr2  8059  axrnegex  8098  axpre-suploclemres  8120