Theorem aptipr 7642

Description: Apartness of positive reals is tight. (Contributed by Jim Kingdon, 28-Jan-2020.)

Assertion

Ref	Expression
aptipr	|- ( ( A e. P. /\ B e. P. /\ -. ( A <P B \/ B <P A ) ) -> A = B )

Proof of Theorem aptipr

Step	Hyp	Ref	Expression
1		simp1 997	. . . 4 |- ( ( A e. P. /\ B e. P. /\ -. ( A <P B \/ B <P A ) ) -> A e. P. )
2		simp2 998	. . . 4 |- ( ( A e. P. /\ B e. P. /\ -. ( A <P B \/ B <P A ) ) -> B e. P. )
3		ioran 752	. . . . . . 7 |- ( -. ( A <P B \/ B <P A ) <-> ( -. A <P B /\ -. B <P A ) )
4	3	biimpi 120	. . . . . 6 |- ( -. ( A <P B \/ B <P A ) -> ( -. A <P B /\ -. B <P A ) )
5	4	3ad2ant3 1020	. . . . 5 |- ( ( A e. P. /\ B e. P. /\ -. ( A <P B \/ B <P A ) ) -> ( -. A <P B /\ -. B <P A ) )
6	5	simprd 114	. . . 4 |- ( ( A e. P. /\ B e. P. /\ -. ( A <P B \/ B <P A ) ) -> -. B <P A )
7		aptiprleml 7640	. . . 4 |- ( ( A e. P. /\ B e. P. /\ -. B <P A ) -> ( 1st ` A ) C_ ( 1st ` B ) )
8	1, 2, 6, 7	syl3anc 1238	. . 3 |- ( ( A e. P. /\ B e. P. /\ -. ( A <P B \/ B <P A ) ) -> ( 1st ` A ) C_ ( 1st ` B ) )
9	5	simpld 112	. . . 4 |- ( ( A e. P. /\ B e. P. /\ -. ( A <P B \/ B <P A ) ) -> -. A <P B )
10		aptiprleml 7640	. . . 4 |- ( ( B e. P. /\ A e. P. /\ -. A <P B ) -> ( 1st ` B ) C_ ( 1st ` A ) )
11	2, 1, 9, 10	syl3anc 1238	. . 3 |- ( ( A e. P. /\ B e. P. /\ -. ( A <P B \/ B <P A ) ) -> ( 1st ` B ) C_ ( 1st ` A ) )
12	8, 11	eqssd 3174	. 2 |- ( ( A e. P. /\ B e. P. /\ -. ( A <P B \/ B <P A ) ) -> ( 1st ` A ) = ( 1st ` B ) )
13		aptiprlemu 7641	. . . 4 |- ( ( B e. P. /\ A e. P. /\ -. A <P B ) -> ( 2nd ` A ) C_ ( 2nd ` B ) )
14	2, 1, 9, 13	syl3anc 1238	. . 3 |- ( ( A e. P. /\ B e. P. /\ -. ( A <P B \/ B <P A ) ) -> ( 2nd ` A ) C_ ( 2nd ` B ) )
15		aptiprlemu 7641	. . . 4 |- ( ( A e. P. /\ B e. P. /\ -. B <P A ) -> ( 2nd ` B ) C_ ( 2nd ` A ) )
16	1, 2, 6, 15	syl3anc 1238	. . 3 |- ( ( A e. P. /\ B e. P. /\ -. ( A <P B \/ B <P A ) ) -> ( 2nd ` B ) C_ ( 2nd ` A ) )
17	14, 16	eqssd 3174	. 2 |- ( ( A e. P. /\ B e. P. /\ -. ( A <P B \/ B <P A ) ) -> ( 2nd ` A ) = ( 2nd ` B ) )
18		preqlu 7473	. . 3 |- ( ( A e. P. /\ B e. P. ) -> ( A = B <-> ( ( 1st ` A ) = ( 1st ` B ) /\ ( 2nd ` A ) = ( 2nd ` B ) ) ) )
19	18	3adant3 1017	. 2 |- ( ( A e. P. /\ B e. P. /\ -. ( A <P B \/ B <P A ) ) -> ( A = B <-> ( ( 1st ` A ) = ( 1st ` B ) /\ ( 2nd ` A ) = ( 2nd ` B ) ) ) )
20	12, 17, 19	mpbir2and 944	1 |- ( ( A e. P. /\ B e. P. /\ -. ( A <P B \/ B <P A ) ) -> A = B )

Syntax hints:   -. wn 3   -> wi 4   /\ wa 104   <-> wb 105   \/ wo 708   /\ w3a 978   = wceq 1353   e. wcel 2148   C_ wss 3131   class class class wbr 4005   ` cfv 5218   1stc1st 6141   2ndc2nd 6142   P.cnp 7292   <P cltp 7296

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 614  ax-in2 615  ax-io 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-13 2150  ax-14 2151  ax-ext 2159  ax-coll 4120  ax-sep 4123  ax-nul 4131  ax-pow 4176  ax-pr 4211  ax-un 4435  ax-setind 4538  ax-iinf 4589

This theorem depends on definitions:  df-bi 117  df-dc 835  df-3or 979  df-3an 980  df-tru 1356  df-fal 1359  df-nf 1461  df-sb 1763  df-eu 2029  df-mo 2030  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-ne 2348  df-ral 2460  df-rex 2461  df-reu 2462  df-rab 2464  df-v 2741  df-sbc 2965  df-csb 3060  df-dif 3133  df-un 3135  df-in 3137  df-ss 3144  df-nul 3425  df-pw 3579  df-sn 3600  df-pr 3601  df-op 3603  df-uni 3812  df-int 3847  df-iun 3890  df-br 4006  df-opab 4067  df-mpt 4068  df-tr 4104  df-eprel 4291  df-id 4295  df-po 4298  df-iso 4299  df-iord 4368  df-on 4370  df-suc 4373  df-iom 4592  df-xp 4634  df-rel 4635  df-cnv 4636  df-co 4637  df-dm 4638  df-rn 4639  df-res 4640  df-ima 4641  df-iota 5180  df-fun 5220  df-fn 5221  df-f 5222  df-f1 5223  df-fo 5224  df-f1o 5225  df-fv 5226  df-ov 5880  df-oprab 5881  df-mpo 5882  df-1st 6143  df-2nd 6144  df-recs 6308  df-irdg 6373  df-1o 6419  df-2o 6420  df-oadd 6423  df-omul 6424  df-er 6537  df-ec 6539  df-qs 6543  df-ni 7305  df-pli 7306  df-mi 7307  df-lti 7308  df-plpq 7345  df-mpq 7346  df-enq 7348  df-nqqs 7349  df-plqqs 7350  df-mqqs 7351  df-1nqqs 7352  df-rq 7353  df-ltnqqs 7354  df-enq0 7425  df-nq0 7426  df-0nq0 7427  df-plq0 7428  df-mq0 7429  df-inp 7467  df-iltp 7471

This theorem is referenced by:  aptisr  7780