HomeHome Metamath Proof Explorer < Previous   Next >
Related theorems
Unicode version

Theorem iooval2 7534
Description: Value of the open interval function.
Assertion
Ref Expression
iooval2 |- ((A e. RR* /\ B e. RR*) -> (A(,)B) = {x e. RR | (A < x /\ x < B)})
Distinct variable groups:   x,A   x,B

Proof of Theorem iooval2
StepHypRef Expression
1 iooval 7533 . 2 |- ((A e. RR* /\ B e. RR*) -> (A(,)B) = {x e. RR* | (A < x /\ x < B)})
2 xrre2 6745 . . . . . . . . . 10 |- (((A e. RR* /\ x e. RR* /\ B e. RR*) /\ (A < x /\ x < B)) -> x e. RR)
32ex 402 . . . . . . . . 9 |- ((A e. RR* /\ x e. RR* /\ B e. RR*) -> ((A < x /\ x < B) -> x e. RR))
433com23 1074 . . . . . . . 8 |- ((A e. RR* /\ B e. RR* /\ x e. RR*) -> ((A < x /\ x < B) -> x e. RR))
543exp 1066 . . . . . . 7 |- (A e. RR* -> (B e. RR* -> (x e. RR* -> ((A < x /\ x < B) -> x e. RR))))
65imp4b 392 . . . . . 6 |- ((A e. RR* /\ B e. RR*) -> ((x e. RR* /\ (A < x /\ x < B)) -> x e. RR))
7 simpr 350 . . . . . . 7 |- ((x e. RR* /\ (A < x /\ x < B)) -> (A < x /\ x < B))
87a1i 8 . . . . . 6 |- ((A e. RR* /\ B e. RR*) -> ((x e. RR* /\ (A < x /\ x < B)) -> (A < x /\ x < B)))
96, 8jcad 661 . . . . 5 |- ((A e. RR* /\ B e. RR*) -> ((x e. RR* /\ (A < x /\ x < B)) -> (x e. RR /\ (A < x /\ x < B))))
10 rexr 6668 . . . . . 6 |- (x e. RR -> x e. RR*)
1110anim1i 361 . . . . 5 |- ((x e. RR /\ (A < x /\ x < B)) -> (x e. RR* /\ (A < x /\ x < B)))
129, 11impbid1 575 . . . 4 |- ((A e. RR* /\ B e. RR*) -> ((x e. RR* /\ (A < x /\ x < B)) <-> (x e. RR /\ (A < x /\ x < B))))
1312abbidv 2008 . . 3 |- ((A e. RR* /\ B e. RR*) -> {x | (x e. RR* /\ (A < x /\ x < B))} = {x | (x e. RR /\ (A < x /\ x < B))})
14 df-rab 2112 . . 3 |- {x e. RR* | (A < x /\ x < B)} = {x | (x e. RR* /\ (A < x /\ x < B))}
15 df-rab 2112 . . 3 |- {x e. RR | (A < x /\ x < B)} = {x | (x e. RR /\ (A < x /\ x < B))}
1613, 14, 153eqtr4g 1953 . 2 |- ((A e. RR* /\ B e. RR*) -> {x e. RR* | (A < x /\ x < B)} = {x e. RR | (A < x /\ x < B)})
171, 16eqtrd 1925 1 |- ((A e. RR* /\ B e. RR*) -> (A(,)B) = {x e. RR | (A < x /\ x < B)})
Colors of variables: wff set class
Syntax hints:   -> wi 3   /\ wa 240   /\ w3a 858   = wceq 1298   e. wcel 1300  {cab 1871  {crab 2108   class class class wbr 3338  (class class class)co 4884  RRcr 6385  RR*cxr 6652   < clt 6653  (,)cioo 7524
This theorem is referenced by:  elioo2 7546  ioomax 7561  ioopos 7562  dfioo2 7572  qdensere 9027
This theorem was proved from axioms:  ax-1 4  ax-2 5  ax-3 6  ax-mp 7  ax-7 1304  ax-gen 1305  ax-8 1306  ax-9 1307  ax-10 1308  ax-11 1309  ax-12 1310  ax-13 1311  ax-14 1312  ax-17 1317  ax-4 1319  ax-5o 1321  ax-6o 1324  ax-9o 1481  ax-10o 1500  ax-16 1580  ax-11o 1588  ax-ext 1865  ax-rep 3428  ax-sep 3438  ax-nul 3445  ax-pow 3481  ax-pr 3524  ax-un 3790  ax-inf2 5731
This theorem depends on definitions:  df-bi 164  df-or 241  df-an 242  df-3or 859  df-3an 860  df-ex 1327  df-sb 1536  df-eu 1775  df-mo 1776  df-clab 1872  df-cleq 1877  df-clel 1880  df-ne 2019  df-nel 2020  df-ral 2109  df-rex 2110  df-reu 2111  df-rab 2112  df-v 2294  df-sbc 2454  df-csb 2541  df-dif 2597  df-un 2600  df-in 2603  df-ss 2605  df-pss 2607  df-nul 2876  df-if 2983  df-pw 3035  df-sn 3049  df-pr 3050  df-tp 3052  df-op 3053  df-uni 3178  df-int 3215  df-iun 3257  df-br 3339  df-opab 3396  df-tr 3412  df-eprel 3583  df-id 3586  df-po 3591  df-so 3604  df-fr 3625  df-we 3644  df-ord 3660  df-on 3661  df-lim 3662  df-suc 3663  df-om 3950  df-xp 4000  df-rel 4001  df-cnv 4002  df-co 4003  df-dm 4004  df-rn 4005  df-res 4006  df-ima 4007  df-fun 4008  df-fn 4009  df-f 4010  df-f1 4011  df-fo 4012  df-f1o 4013  df-fv 4014  df-opr 4886  df-oprab 4887  df-1st 5020  df-2nd 5021  df-rdg 5140  df-1o 5177  df-oadd 5179  df-omul 5180  df-er 5318  df-ec 5320  df-qs 5323  df-en 5427  df-dom 5428  df-sdom 5429  df-ni 6152  df-pli 6153  df-mi 6154  df-lti 6155  df-plpq 6187  df-mpq 6188  df-enq 6189  df-nq 6190  df-plq 6191  df-mq 6192  df-rq 6193  df-ltq 6194  df-1q 6195  df-np 6238  df-1p 6239  df-plp 6240  df-ltp 6242  df-enr 6318  df-nr 6319  df-ltr 6322  df-0r 6323  df-c 6392  df-r 6396  df-lt 6399  df-pnf 6654  df-mnf 6655  df-xr 6656  df-ltxr 6657  df-le 6658  df-ioo 7528
Copyright terms: Public domain