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Theorem xrlttrt 5526
Description: Ordering on the extended reals is transitive.
Assertion
Ref Expression
xrlttrt |- ((A e. RR* /\ B e. RR* /\ C e. RR*) -> ((A < B /\ B < C) -> A < C))

Proof of Theorem xrlttrt
StepHypRef Expression
1 axlttrn 5476 . . . . . . . . . . . 12 |- ((A e. RR /\ B e. RR /\ C e. RR) -> ((A < B /\ B < C) -> A < C))
213expa 831 . . . . . . . . . . 11 |- (((A e. RR /\ B e. RR) /\ C e. RR) -> ((A < B /\ B < C) -> A < C))
32an1rs 488 . . . . . . . . . 10 |- (((A e. RR /\ C e. RR) /\ B e. RR) -> ((A < B /\ B < C) -> A < C))
4 rexrt 5471 . . . . . . . . . . . . . . . 16 |- (C e. RR -> C e. RR*)
5 pnfnltt 5519 . . . . . . . . . . . . . . . 16 |- (C e. RR* -> -. +oo < C)
64, 5syl 10 . . . . . . . . . . . . . . 15 |- (C e. RR -> -. +oo < C)
76adantr 389 . . . . . . . . . . . . . 14 |- ((C e. RR /\ B = +oo) -> -. +oo < C)
8 breq1 2612 . . . . . . . . . . . . . . 15 |- (B = +oo -> (B < C <-> +oo < C))
98adantl 388 . . . . . . . . . . . . . 14 |- ((C e. RR /\ B = +oo) -> (B < C <-> +oo < C))
107, 9mtbird 713 . . . . . . . . . . . . 13 |- ((C e. RR /\ B = +oo) -> -. B < C)
1110pm2.21d 78 . . . . . . . . . . . 12 |- ((C e. RR /\ B = +oo) -> (B < C -> A < C))
1211adantll 392 . . . . . . . . . . 11 |- (((A e. RR /\ C e. RR) /\ B = +oo) -> (B < C -> A < C))
1312adantld 390 . . . . . . . . . 10 |- (((A e. RR /\ C e. RR) /\ B = +oo) -> ((A < B /\ B < C) -> A < C))
14 rexrt 5471 . . . . . . . . . . . . . . . 16 |- (A e. RR -> A e. RR*)
15 nltmnft 5520 . . . . . . . . . . . . . . . 16 |- (A e. RR* -> -. A < -oo)
1614, 15syl 10 . . . . . . . . . . . . . . 15 |- (A e. RR -> -. A < -oo)
1716adantr 389 . . . . . . . . . . . . . 14 |- ((A e. RR /\ B = -oo) -> -. A < -oo)
18 breq2 2613 . . . . . . . . . . . . . . 15 |- (B = -oo -> (A < B <-> A < -oo))
1918adantl 388 . . . . . . . . . . . . . 14 |- ((A e. RR /\ B = -oo) -> (A < B <-> A < -oo))
2017, 19mtbird 713 . . . . . . . . . . . . 13 |- ((A e. RR /\ B = -oo) -> -. A < B)
2120pm2.21d 78 . . . . . . . . . . . 12 |- ((A e. RR /\ B = -oo) -> (A < B -> A < C))
2221adantlr 393 . . . . . . . . . . 11 |- (((A e. RR /\ C e. RR) /\ B = -oo) -> (A < B -> A < C))
2322adantrd 391 . . . . . . . . . 10 |- (((A e. RR /\ C e. RR) /\ B = -oo) -> ((A < B /\ B < C) -> A < C))
243, 13, 233jaodan 887 . . . . . . . . 9 |- (((A e. RR /\ C e. RR) /\ (B e. RR \/ B = +oo \/ B = -oo)) -> ((A < B /\ B < C) -> A < C))
25 elxr 5508 . . . . . . . . 9 |- (B e. RR* <-> (B e. RR \/ B = +oo \/ B = -oo))
2624, 25sylan2b 452 . . . . . . . 8 |- (((A e. RR /\ C e. RR) /\ B e. RR*) -> ((A < B /\ B < C) -> A < C))
2726an1rs 488 . . . . . . 7 |- (((A e. RR /\ B e. RR*) /\ C e. RR) -> ((A < B /\ B < C) -> A < C))
28 ltpnft 5515 . . . . . . . . . . 11 |- (A e. RR -> A < +oo)
2928adantr 389 . . . . . . . . . 10 |- ((A e. RR /\ C = +oo) -> A < +oo)
30 breq2 2613 . . . . . . . . . . 11 |- (C = +oo -> (A < C <-> A < +oo))
3130adantl 388 . . . . . . . . . 10 |- ((A e. RR /\ C = +oo) -> (A < C <-> A < +oo))
3229, 31mpbird 196 . . . . . . . . 9 |- ((A e. RR /\ C = +oo) -> A < C)
3332adantlr 393 . . . . . . . 8 |- (((A e. RR /\ B e. RR*) /\ C = +oo) -> A < C)
3433a1d 12 . . . . . . 7 |- (((A e. RR /\ B e. RR*) /\ C = +oo) -> ((A < B /\ B < C) -> A < C))
35 nltmnft 5520 . . . . . . . . . . . 12 |- (B e. RR* -> -. B < -oo)
3635adantr 389 . . . . . . . . . . 11 |- ((B e. RR* /\ C = -oo) -> -. B < -oo)
37 breq2 2613 . . . . . . . . . . . 12 |- (C = -oo -> (B < C <-> B < -oo))
3837adantl 388 . . . . . . . . . . 11 |- ((B e. RR* /\ C = -oo) -> (B < C <-> B < -oo))
3936, 38mtbird 713 . . . . . . . . . 10 |- ((B e. RR* /\ C = -oo) -> -. B < C)
4039pm2.21d 78 . . . . . . . . 9 |- ((B e. RR* /\ C = -oo) -> (B < C -> A < C))
4140adantld 390 . . . . . . . 8 |- ((B e. RR* /\ C = -oo) -> ((A < B /\ B < C) -> A < C))
4241adantll 392 . . . . . . 7 |- (((A e. RR /\ B e. RR*) /\ C = -oo) -> ((A < B /\ B < C) -> A < C))
4327, 34, 423jaodan 887 . . . . . 6 |- (((A e. RR /\ B e. RR*) /\ (C e. RR \/ C = +oo \/ C = -oo)) -> ((A < B /\ B < C) -> A < C))
4443anasss 440 . . . . 5 |- ((A e. RR /\ (B e. RR* /\ (C e. RR \/ C = +oo \/ C = -oo))) -> ((A < B /\ B < C) -> A < C))
45 pnfnltt 5519 . . . . . . . . . 10 |- (B e. RR* -> -. +oo < B)
4645adantl 388 . . . . . . . . 9 |- ((A = +oo /\ B e. RR*) -> -. +oo < B)
47 breq1 2612 . . . . . . . . . 10 |- (A = +oo -> (A < B <-> +oo < B))
4847adantr 389 . . . . . . . . 9 |- ((A = +oo /\ B e. RR*) -> (A < B <-> +oo < B))
4946, 48mtbird 713 . . . . . . . 8 |- ((A = +oo /\ B e. RR*) -> -. A < B)
5049pm2.21d 78 . . . . . . 7 |- ((A = +oo /\ B e. RR*) -> (A < B -> A < C))
5150adantrd 391 . . . . . 6 |- ((A = +oo /\ B e. RR*) -> ((A < B /\ B < C) -> A < C))
5251adantrr 395 . . . . 5 |- ((A = +oo /\ (B e. RR* /\ (C e. RR \/ C = +oo \/ C = -oo))) -> ((A < B /\ B < C) -> A < C))
53 mnfltt 5516 . . . . . . . . . . 11 |- (C e. RR -> -oo < C)
5453adantl 388 . . . . . . . . . 10 |- ((A = -oo /\ C e. RR) -> -oo < C)
55 breq1 2612 . . . . . . . . . . 11 |- (A = -oo -> (A < C <-> -oo < C))
5655adantr 389 . . . . . . . . . 10 |- ((A = -oo /\ C e. RR) -> (A < C <-> -oo < C))
5754, 56mpbird 196 . . . . . . . . 9 |- ((A = -oo /\ C e. RR) -> A < C)
5857a1d 12 . . . . . . . 8 |- ((A = -oo /\ C e. RR) -> ((A < B /\ B < C) -> A < C))
5958adantlr 393 . . . . . . 7 |- (((A = -oo /\ B e. RR*) /\ C e. RR) -> ((A < B /\ B < C) -> A < C))
60 mnfltpnf 5517 . . . . . . . . . 10 |- -oo < +oo
61 breq12 2614 . . . . . . . . . 10 |- ((A = -oo /\ C = +oo) -> (A < C <-> -oo < +oo))
6260, 61mpbiri 194 . . . . . . . . 9 |- ((A = -oo /\ C = +oo) -> A < C)
6362a1d 12 . . . . . . . 8 |- ((A = -oo /\ C = +oo) -> ((A < B /\ B < C) -> A < C))
6463adantlr 393 . . . . . . 7 |- (((A = -oo /\ B e. RR*) /\ C = +oo) -> ((A < B /\ B < C) -> A < C))
6541adantll 392 . . . . . . 7 |- (((A = -oo /\ B e. RR*) /\ C = -oo) -> ((A < B /\ B < C) -> A < C))
6659, 64, 653jaodan 887 . . . . . 6 |- (((A = -oo /\ B e. RR*) /\ (C e. RR \/ C = +oo \/ C = -oo)) -> ((A < B /\ B < C) -> A < C))
6766anasss 440 . . . . 5 |- ((A = -oo /\ (B e. RR* /\ (C e. RR \/ C = +oo \/ C = -oo))) -> ((A < B /\ B < C) -> A < C))
6844, 52, 673jaoian 886 . . . 4 |- (((A e. RR \/ A = +oo \/ A = -oo) /\ (B e. RR* /\ (C e. RR \/ C = +oo \/ C = -oo))) -> ((A < B /\ B < C) -> A < C))
69683impb 827 . . 3 |- (((A e. RR \/ A = +oo \/ A = -oo) /\ B e. RR* /\ (C e. RR \/ C = +oo \/ C = -oo)) -> ((A < B /\ B < C) -> A < C))
70 elxr 5508 . . 3 |- (C e. RR* <-> (C e. RR \/ C = +oo \/ C = -oo))
7169, 70syl3an3b 862 . 2 |- (((A e. RR \/ A = +oo \/ A = -oo) /\ B e. RR* /\ C e. RR*) -> ((A < B /\ B < C) -> A < C))
72 elxr 5508 . 2 |- (A e. RR* <-> (A e. RR \/ A = +oo \/ A = -oo))
7371, 72syl3an1b 860 1 |- ((A e. RR* /\ B e. RR* /\ C e. RR*) -> ((A < B /\ B < C) -> A < C))
Colors of variables: wff set class
Syntax hints:  -. wn 2   -> wi 3   <-> wb 146   /\ wa 223   \/ w3o 772   /\ w3a 773   = wceq 953   e. wcel 955   class class class wbr 2609  RRcr 5205   +oocpnf 5455   -oocmnf 5456  RR*cxr 5457   < clt 5458
This theorem is referenced by:  xrltso 5527  xrlelttrt 5535  xrltletrt 5536  xrub 6027  qbtwnxr 6217  ioo0t 6305  elioc2t 6322  elico2t 6323  elioo1t3 10383  truni1 10386
This theorem was proved from axioms:  ax-1 4  ax-2 5  ax-3 6  ax-mp 7  ax-7 959  ax-gen 960  ax-8 961  ax-9 962  ax-10 963  ax-11 964  ax-12 965  ax-13 966  ax-14 967  ax-17 968  ax-4 970  ax-5o 972  ax-6o 975  ax-9o 1119  ax-10o 1136  ax-16 1206  ax-11o 1213  ax-ext 1452  ax-rep 2683  ax-sep 2693  ax-nul 2700  ax-pow 2732  ax-pr 2769  ax-un 2857  ax-inf2 4597
This theorem depends on definitions:  df-bi 147  df-or 224  df-an 225  df-3or 774  df-3an 775  df-ex 978  df-sb 1168  df-eu 1375  df-mo 1376  df-clab 1457  df-cleq 1462  df-clel 1465  df-ne 1579  df-nel 1580  df-ral