Theorem elico2 11591

Description: Membership in a closed-below, open-above real interval. (Contributed by Paul Chapman, 21-Jan-2008.) (Revised by Mario Carneiro, 14-Jun-2014.)

Assertion

Ref	Expression
elico2	|- ( ( A e. RR /\ B e. RR* ) -> ( C e. ( A [,) B ) <-> ( C e. RR /\ A <_ C /\ C < B ) ) )

Proof of Theorem elico2

Step	Hyp	Ref	Expression
1		rexr 9628	. . 3 |- ( A e. RR -> A e. RR* )
2		elico1 11575	. . 3 |- ( ( A e. RR* /\ B e. RR* ) -> ( C e. ( A [,) B ) <-> ( C e. RR* /\ A <_ C /\ C < B ) ) )
3	1, 2	sylan 469	. 2 |- ( ( A e. RR /\ B e. RR* ) -> ( C e. ( A [,) B ) <-> ( C e. RR* /\ A <_ C /\ C < B ) ) )
4		mnfxr 11326	. . . . . . . 8 |- -oo e. RR*
5	4	a1i 11	. . . . . . 7 |- ( ( ( A e. RR /\ B e. RR* ) /\ ( C e. RR* /\ A <_ C /\ C < B ) ) -> -oo e. RR* )
6	1	ad2antrr 723	. . . . . . 7 |- ( ( ( A e. RR /\ B e. RR* ) /\ ( C e. RR* /\ A <_ C /\ C < B ) ) -> A e. RR* )
7		simpr1 1000	. . . . . . 7 |- ( ( ( A e. RR /\ B e. RR* ) /\ ( C e. RR* /\ A <_ C /\ C < B ) ) -> C e. RR* )
8		mnflt 11336	. . . . . . . 8 |- ( A e. RR -> -oo < A )
9	8	ad2antrr 723	. . . . . . 7 |- ( ( ( A e. RR /\ B e. RR* ) /\ ( C e. RR* /\ A <_ C /\ C < B ) ) -> -oo < A )
10		simpr2 1001	. . . . . . 7 |- ( ( ( A e. RR /\ B e. RR* ) /\ ( C e. RR* /\ A <_ C /\ C < B ) ) -> A <_ C )
11	5, 6, 7, 9, 10	xrltletrd 11367	. . . . . 6 |- ( ( ( A e. RR /\ B e. RR* ) /\ ( C e. RR* /\ A <_ C /\ C < B ) ) -> -oo < C )
12		simplr 753	. . . . . . 7 |- ( ( ( A e. RR /\ B e. RR* ) /\ ( C e. RR* /\ A <_ C /\ C < B ) ) -> B e. RR* )
13		pnfxr 11324	. . . . . . . 8 |- +oo e. RR*
14	13	a1i 11	. . . . . . 7 |- ( ( ( A e. RR /\ B e. RR* ) /\ ( C e. RR* /\ A <_ C /\ C < B ) ) -> +oo e. RR* )
15		simpr3 1002	. . . . . . 7 |- ( ( ( A e. RR /\ B e. RR* ) /\ ( C e. RR* /\ A <_ C /\ C < B ) ) -> C < B )
16		pnfge 11342	. . . . . . . 8 |- ( B e. RR* -> B <_ +oo )
17	16	ad2antlr 724	. . . . . . 7 |- ( ( ( A e. RR /\ B e. RR* ) /\ ( C e. RR* /\ A <_ C /\ C < B ) ) -> B <_ +oo )
18	7, 12, 14, 15, 17	xrltletrd 11367	. . . . . 6 |- ( ( ( A e. RR /\ B e. RR* ) /\ ( C e. RR* /\ A <_ C /\ C < B ) ) -> C < +oo )
19		xrrebnd 11372	. . . . . . 7 |- ( C e. RR* -> ( C e. RR <-> ( -oo < C /\ C < +oo ) ) )
20	7, 19	syl 16	. . . . . 6 |- ( ( ( A e. RR /\ B e. RR* ) /\ ( C e. RR* /\ A <_ C /\ C < B ) ) -> ( C e. RR <-> ( -oo < C /\ C < +oo ) ) )
21	11, 18, 20	mpbir2and 920	. . . . 5 |- ( ( ( A e. RR /\ B e. RR* ) /\ ( C e. RR* /\ A <_ C /\ C < B ) ) -> C e. RR )
22	21, 10, 15	3jca 1174	. . . 4 |- ( ( ( A e. RR /\ B e. RR* ) /\ ( C e. RR* /\ A <_ C /\ C < B ) ) -> ( C e. RR /\ A <_ C /\ C < B ) )
23	22	ex 432	. . 3 |- ( ( A e. RR /\ B e. RR* ) -> ( ( C e. RR* /\ A <_ C /\ C < B ) -> ( C e. RR /\ A <_ C /\ C < B ) ) )
24		rexr 9628	. . . 4 |- ( C e. RR -> C e. RR* )
25	24	3anim1i 1180	. . 3 |- ( ( C e. RR /\ A <_ C /\ C < B ) -> ( C e. RR* /\ A <_ C /\ C < B ) )
26	23, 25	impbid1 203	. 2 |- ( ( A e. RR /\ B e. RR* ) -> ( ( C e. RR* /\ A <_ C /\ C < B ) <-> ( C e. RR /\ A <_ C /\ C < B ) ) )
27	3, 26	bitrd 253	1 |- ( ( A e. RR /\ B e. RR* ) -> ( C e. ( A [,) B ) <-> ( C e. RR /\ A <_ C /\ C < B ) ) )

Syntax hints:   -> wi 4   <-> wb 184   /\ wa 367   /\ w3a 971   e. wcel 1823   class class class wbr 4439  (class class class)co 6270   RRcr 9480   +oocpnf 9614   -oocmnf 9615   RR*cxr 9616   < clt 9617   <_ cle 9618   [,)cico 11534

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1623  ax-4 1636  ax-5 1709  ax-6 1752  ax-7 1795  ax-8 1825  ax-9 1827  ax-10 1842  ax-11 1847  ax-12 1859  ax-13 2004  ax-ext 2432  ax-sep 4560  ax-nul 4568  ax-pow 4615  ax-pr 4676  ax-un 6565  ax-cnex 9537  ax-resscn 9538  ax-pre-lttri 9555  ax-pre-lttrn 9556

This theorem depends on definitions:  df-bi 185  df-or 368  df-an 369  df-3or 972  df-3an 973  df-tru 1401  df-ex 1618  df-nf 1622  df-sb 1745  df-eu 2288  df-mo 2289  df-clab 2440  df-cleq 2446  df-clel 2449  df-nfc 2604  df-ne 2651  df-nel 2652  df-ral 2809  df-rex 2810  df-rab 2813  df-v 3108  df-sbc 3325  df-csb 3421  df-dif 3464  df-un 3466  df-in 3468  df-ss 3475  df-nul 3784  df-if 3930  df-pw 4001  df-sn 4017  df-pr 4019  df-op 4023  df-uni 4236  df-br 4440  df-opab 4498  df-mpt 4499  df-id 4784  df-po 4789  df-so 4790  df-xp 4994  df-rel 4995  df-cnv 4996  df-co 4997  df-dm 4998  df-rn 4999  df-res 5000  df-ima 5001  df-iota 5534  df-fun 5572  df-fn 5573  df-f 5574  df-f1 5575  df-fo 5576  df-f1o 5577  df-fv 5578  df-ov 6273  df-oprab 6274  df-mpt2 6275  df-er 7303  df-en 7510  df-dom 7511  df-sdom 7512  df-pnf 9619  df-mnf 9620  df-xr 9621  df-ltxr 9622  df-le 9623  df-ico 11538

This theorem is referenced by:  icossre  11608  elicopnf  11623  icoshft  11645  rge0srg  18682  metustexhalfOLD  21232  metustexhalf  21233  cnbl0  21447  icoopnst  21605  iocopnst  21606  icopnfcnv  21608  icopnfhmeo  21609  iccpnfcnv  21610  psercnlem2  22985  psercnlem1  22986  psercn  22987  abelth  23002  tanord1  23090  tanord  23091  efopnlem1  23205  logtayl  23209  rlimcnp  23493  rlimcnp2  23494  dchrvmasumlem2  23881  dchrvmasumiflem1  23884  pntlemb  23980  pnt  23997  ubico  27820  xrge0slmod  28069  voliune  28438  volfiniune  28439  dya2icoseg  28485  sibfinima  28545  tan2h  30287  itg2addnclem2  30307  icodiamlt  30995  modelico  30996  binomcxplemdvbinom  31499  binomcxplemcvg  31500  binomcxplemnotnn0  31502  fprodge0  31836  fprodge1  31837  limciccioolb  31866  fourierdlem32  32160  fourierdlem43  32171  fourierdlem63  32191  fourierdlem79  32207  fouriersw  32253  expnegico01  33377  dignnld  33478