Theorem iccneg 10223

Description: Membership in a negated closed real interval. (Contributed by Paul Chapman, 26-Nov-2007.)

Assertion

Ref	Expression
iccneg	|- ( ( A e. RR /\ B e. RR /\ C e. RR ) -> ( C e. ( A [,] B ) <-> -u C e. ( -u B [,] -u A ) ) )

Proof of Theorem iccneg

Step	Hyp	Ref	Expression
1		renegcl 8439	. . . . 5 |- ( C e. RR -> -u C e. RR )
2		ax-1 6	. . . . 5 |- ( C e. RR -> ( -u C e. RR -> C e. RR ) )
3	1, 2	impbid2 143	. . . 4 |- ( C e. RR -> ( C e. RR <-> -u C e. RR ) )
4	3	3ad2ant3 1046	. . 3 |- ( ( A e. RR /\ B e. RR /\ C e. RR ) -> ( C e. RR <-> -u C e. RR ) )
5		ancom 266	. . . 4 |- ( ( C <_ B /\ A <_ C ) <-> ( A <_ C /\ C <_ B ) )
6		leneg 8644	. . . . . . 7 |- ( ( C e. RR /\ B e. RR ) -> ( C <_ B <-> -u B <_ -u C ) )
7	6	ancoms 268	. . . . . 6 |- ( ( B e. RR /\ C e. RR ) -> ( C <_ B <-> -u B <_ -u C ) )
8	7	3adant1 1041	. . . . 5 |- ( ( A e. RR /\ B e. RR /\ C e. RR ) -> ( C <_ B <-> -u B <_ -u C ) )
9		leneg 8644	. . . . . 6 |- ( ( A e. RR /\ C e. RR ) -> ( A <_ C <-> -u C <_ -u A ) )
10	9	3adant2 1042	. . . . 5 |- ( ( A e. RR /\ B e. RR /\ C e. RR ) -> ( A <_ C <-> -u C <_ -u A ) )
11	8, 10	anbi12d 473	. . . 4 |- ( ( A e. RR /\ B e. RR /\ C e. RR ) -> ( ( C <_ B /\ A <_ C ) <-> ( -u B <_ -u C /\ -u C <_ -u A ) ) )
12	5, 11	bitr3id 194	. . 3 |- ( ( A e. RR /\ B e. RR /\ C e. RR ) -> ( ( A <_ C /\ C <_ B ) <-> ( -u B <_ -u C /\ -u C <_ -u A ) ) )
13	4, 12	anbi12d 473	. 2 |- ( ( A e. RR /\ B e. RR /\ C e. RR ) -> ( ( C e. RR /\ ( A <_ C /\ C <_ B ) ) <-> ( -u C e. RR /\ ( -u B <_ -u C /\ -u C <_ -u A ) ) ) )
14		elicc2 10172	. . . 4 |- ( ( A e. RR /\ B e. RR ) -> ( C e. ( A [,] B ) <-> ( C e. RR /\ A <_ C /\ C <_ B ) ) )
15	14	3adant3 1043	. . 3 |- ( ( A e. RR /\ B e. RR /\ C e. RR ) -> ( C e. ( A [,] B ) <-> ( C e. RR /\ A <_ C /\ C <_ B ) ) )
16		3anass 1008	. . 3 |- ( ( C e. RR /\ A <_ C /\ C <_ B ) <-> ( C e. RR /\ ( A <_ C /\ C <_ B ) ) )
17	15, 16	bitrdi 196	. 2 |- ( ( A e. RR /\ B e. RR /\ C e. RR ) -> ( C e. ( A [,] B ) <-> ( C e. RR /\ ( A <_ C /\ C <_ B ) ) ) )
18		renegcl 8439	. . . . 5 |- ( B e. RR -> -u B e. RR )
19		renegcl 8439	. . . . 5 |- ( A e. RR -> -u A e. RR )
20		elicc2 10172	. . . . 5 |- ( ( -u B e. RR /\ -u A e. RR ) -> ( -u C e. ( -u B [,] -u A ) <-> ( -u C e. RR /\ -u B <_ -u C /\ -u C <_ -u A ) ) )
21	18, 19, 20	syl2anr 290	. . . 4 |- ( ( A e. RR /\ B e. RR ) -> ( -u C e. ( -u B [,] -u A ) <-> ( -u C e. RR /\ -u B <_ -u C /\ -u C <_ -u A ) ) )
22	21	3adant3 1043	. . 3 |- ( ( A e. RR /\ B e. RR /\ C e. RR ) -> ( -u C e. ( -u B [,] -u A ) <-> ( -u C e. RR /\ -u B <_ -u C /\ -u C <_ -u A ) ) )
23		3anass 1008	. . 3 |- ( ( -u C e. RR /\ -u B <_ -u C /\ -u C <_ -u A ) <-> ( -u C e. RR /\ ( -u B <_ -u C /\ -u C <_ -u A ) ) )
24	22, 23	bitrdi 196	. 2 |- ( ( A e. RR /\ B e. RR /\ C e. RR ) -> ( -u C e. ( -u B [,] -u A ) <-> ( -u C e. RR /\ ( -u B <_ -u C /\ -u C <_ -u A ) ) ) )
25	13, 17, 24	3bitr4d 220	1 |- ( ( A e. RR /\ B e. RR /\ C e. RR ) -> ( C e. ( A [,] B ) <-> -u C e. ( -u B [,] -u A ) ) )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   /\ w3a 1004   e. wcel 2202   class class class wbr 4088  (class class class)co 6017   RRcr 8030   <_ cle 8214   -ucneg 8350   [,]cicc 10125

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-sep 4207  ax-pow 4264  ax-pr 4299  ax-un 4530  ax-setind 4635  ax-cnex 8122  ax-resscn 8123  ax-1cn 8124  ax-1re 8125  ax-icn 8126  ax-addcl 8127  ax-addrcl 8128  ax-mulcl 8129  ax-addcom 8131  ax-addass 8133  ax-distr 8135  ax-i2m1 8136  ax-0id 8139  ax-rnegex 8140  ax-cnre 8142  ax-pre-ltirr 8143  ax-pre-ltwlin 8144  ax-pre-lttrn 8145  ax-pre-ltadd 8147

This theorem depends on definitions:  df-bi 117  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-nel 2498  df-ral 2515  df-rex 2516  df-reu 2517  df-rab 2519  df-v 2804  df-sbc 3032  df-dif 3202  df-un 3204  df-in 3206  df-ss 3213  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-br 4089  df-opab 4151  df-id 4390  df-po 4393  df-iso 4394  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-iota 5286  df-fun 5328  df-fv 5334  df-riota 5970  df-ov 6020  df-oprab 6021  df-mpo 6022  df-pnf 8215  df-mnf 8216  df-xr 8217  df-ltxr 8218  df-le 8219  df-sub 8351  df-neg 8352  df-icc 10129

This theorem is referenced by: (None)