Theorem rennim 11146

Description: A real number does not lie on the negative imaginary axis. (Contributed by Mario Carneiro, 8-Jul-2013.)

Assertion

Ref	Expression
rennim	|- ( A e. RR -> ( _i x. A ) e/ RR+ )

Proof of Theorem rennim

Step	Hyp	Ref	Expression
1		ax-icn 7967	. . . . . . 7 |- _i e. CC
2		recn 8005	. . . . . . 7 |- ( A e. RR -> A e. CC )
3		mulcl 7999	. . . . . . 7 |- ( ( _i e. CC /\ A e. CC ) -> ( _i x. A ) e. CC )
4	1, 2, 3	sylancr 414	. . . . . 6 |- ( A e. RR -> ( _i x. A ) e. CC )
5		rpre 9726	. . . . . . 7 |- ( ( _i x. A ) e. RR+ -> ( _i x. A ) e. RR )
6		rereb 11007	. . . . . . 7 |- ( ( _i x. A ) e. CC -> ( ( _i x. A ) e. RR <-> ( Re ` ( _i x. A ) ) = ( _i x. A ) ) )
7	5, 6	imbitrid 154	. . . . . 6 |- ( ( _i x. A ) e. CC -> ( ( _i x. A ) e. RR+ -> ( Re ` ( _i x. A ) ) = ( _i x. A ) ) )
8	4, 7	syl 14	. . . . 5 |- ( A e. RR -> ( ( _i x. A ) e. RR+ -> ( Re ` ( _i x. A ) ) = ( _i x. A ) ) )
9	4	addlidd 8169	. . . . . . . 8 |- ( A e. RR -> ( 0 + ( _i x. A ) ) = ( _i x. A ) )
10	9	fveq2d 5558	. . . . . . 7 |- ( A e. RR -> ( Re ` ( 0 + ( _i x. A ) ) ) = ( Re ` ( _i x. A ) ) )
11		0re 8019	. . . . . . . 8 |- 0 e. RR
12		crre 11001	. . . . . . . 8 |- ( ( 0 e. RR /\ A e. RR ) -> ( Re ` ( 0 + ( _i x. A ) ) ) = 0 )
13	11, 12	mpan 424	. . . . . . 7 |- ( A e. RR -> ( Re ` ( 0 + ( _i x. A ) ) ) = 0 )
14	10, 13	eqtr3d 2228	. . . . . 6 |- ( A e. RR -> ( Re ` ( _i x. A ) ) = 0 )
15	14	eqeq1d 2202	. . . . 5 |- ( A e. RR -> ( ( Re ` ( _i x. A ) ) = ( _i x. A ) <-> 0 = ( _i x. A ) ) )
16	8, 15	sylibd 149	. . . 4 |- ( A e. RR -> ( ( _i x. A ) e. RR+ -> 0 = ( _i x. A ) ) )
17		rpne0 9735	. . . . . 6 |- ( ( _i x. A ) e. RR+ -> ( _i x. A ) =/= 0 )
18	17	necon2bi 2419	. . . . 5 |- ( ( _i x. A ) = 0 -> -. ( _i x. A ) e. RR+ )
19	18	eqcoms 2196	. . . 4 |- ( 0 = ( _i x. A ) -> -. ( _i x. A ) e. RR+ )
20	16, 19	syl6 33	. . 3 |- ( A e. RR -> ( ( _i x. A ) e. RR+ -> -. ( _i x. A ) e. RR+ ) )
21	20	pm2.01d 619	. 2 |- ( A e. RR -> -. ( _i x. A ) e. RR+ )
22		df-nel 2460	. 2 |- ( ( _i x. A ) e/ RR+ <-> -. ( _i x. A ) e. RR+ )
23	21, 22	sylibr 134	1 |- ( A e. RR -> ( _i x. A ) e/ RR+ )

Syntax hints:   -. wn 3   -> wi 4   = wceq 1364   e. wcel 2164   e/ wnel 2459   ` cfv 5254  (class class class)co 5918   CCcc 7870   RRcr 7871   0cc0 7872   _ici 7874   + caddc 7875   x. cmul 7877   RR+crp 9719   Recre 10984

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 615  ax-in2 616  ax-io 710  ax-5 1458  ax-7 1459  ax-gen 1460  ax-ie1 1504  ax-ie2 1505  ax-8 1515  ax-10 1516  ax-11 1517  ax-i12 1518  ax-bndl 1520  ax-4 1521  ax-17 1537  ax-i9 1541  ax-ial 1545  ax-i5r 1546  ax-13 2166  ax-14 2167  ax-ext 2175  ax-sep 4147  ax-pow 4203  ax-pr 4238  ax-un 4464  ax-setind 4569  ax-cnex 7963  ax-resscn 7964  ax-1cn 7965  ax-1re 7966  ax-icn 7967  ax-addcl 7968  ax-addrcl 7969  ax-mulcl 7970  ax-mulrcl 7971  ax-addcom 7972  ax-mulcom 7973  ax-addass 7974  ax-mulass 7975  ax-distr 7976  ax-i2m1 7977  ax-0lt1 7978  ax-1rid 7979  ax-0id 7980  ax-rnegex 7981  ax-precex 7982  ax-cnre 7983  ax-pre-ltirr 7984  ax-pre-ltwlin 7985  ax-pre-lttrn 7986  ax-pre-apti 7987  ax-pre-ltadd 7988  ax-pre-mulgt0 7989  ax-pre-mulext 7990

This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1367  df-fal 1370  df-nf 1472  df-sb 1774  df-eu 2045  df-mo 2046  df-clab 2180  df-cleq 2186  df-clel 2189  df-nfc 2325  df-ne 2365  df-nel 2460  df-ral 2477  df-rex 2478  df-reu 2479  df-rmo 2480  df-rab 2481  df-v 2762  df-sbc 2986  df-dif 3155  df-un 3157  df-in 3159  df-ss 3166  df-pw 3603  df-sn 3624  df-pr 3625  df-op 3627  df-uni 3836  df-br 4030  df-opab 4091  df-mpt 4092  df-id 4324  df-po 4327  df-iso 4328  df-xp 4665  df-rel 4666  df-cnv 4667  df-co 4668  df-dm 4669  df-rn 4670  df-res 4671  df-ima 4672  df-iota 5215  df-fun 5256  df-fn 5257  df-f 5258  df-fv 5262  df-riota 5873  df-ov 5921  df-oprab 5922  df-mpo 5923  df-pnf 8056  df-mnf 8057  df-xr 8058  df-ltxr 8059  df-le 8060  df-sub 8192  df-neg 8193  df-reap 8594  df-ap 8601  df-div 8692  df-2 9041  df-rp 9720  df-cj 10986  df-re 10987  df-im 10988

This theorem is referenced by: (None)