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Theorem negiso 8673
Description: Negation is an order anti-isomorphism of the real numbers, which is its own inverse. (Contributed by Mario Carneiro, 24-Dec-2016.)
Hypothesis
Ref Expression
negiso.1 𝐹 = (𝑥 ∈ ℝ ↦ -𝑥)
Assertion
Ref Expression
negiso (𝐹 Isom < , < (ℝ, ℝ) ∧ 𝐹 = 𝐹)

Proof of Theorem negiso
Dummy variables 𝑦 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 negiso.1 . . . . . 6 𝐹 = (𝑥 ∈ ℝ ↦ -𝑥)
2 simpr 109 . . . . . . 7 ((⊤ ∧ 𝑥 ∈ ℝ) → 𝑥 ∈ ℝ)
32renegcld 8106 . . . . . 6 ((⊤ ∧ 𝑥 ∈ ℝ) → -𝑥 ∈ ℝ)
4 simpr 109 . . . . . . 7 ((⊤ ∧ 𝑦 ∈ ℝ) → 𝑦 ∈ ℝ)
54renegcld 8106 . . . . . 6 ((⊤ ∧ 𝑦 ∈ ℝ) → -𝑦 ∈ ℝ)
6 recn 7717 . . . . . . . 8 (𝑥 ∈ ℝ → 𝑥 ∈ ℂ)
7 recn 7717 . . . . . . . 8 (𝑦 ∈ ℝ → 𝑦 ∈ ℂ)
8 negcon2 7979 . . . . . . . 8 ((𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ) → (𝑥 = -𝑦𝑦 = -𝑥))
96, 7, 8syl2an 285 . . . . . . 7 ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (𝑥 = -𝑦𝑦 = -𝑥))
109adantl 273 . . . . . 6 ((⊤ ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) → (𝑥 = -𝑦𝑦 = -𝑥))
111, 3, 5, 10f1ocnv2d 5940 . . . . 5 (⊤ → (𝐹:ℝ–1-1-onto→ℝ ∧ 𝐹 = (𝑦 ∈ ℝ ↦ -𝑦)))
1211mptru 1323 . . . 4 (𝐹:ℝ–1-1-onto→ℝ ∧ 𝐹 = (𝑦 ∈ ℝ ↦ -𝑦))
1312simpli 110 . . 3 𝐹:ℝ–1-1-onto→ℝ
14 simpl 108 . . . . . . . 8 ((𝑧 ∈ ℝ ∧ 𝑦 ∈ ℝ) → 𝑧 ∈ ℝ)
1514recnd 7758 . . . . . . 7 ((𝑧 ∈ ℝ ∧ 𝑦 ∈ ℝ) → 𝑧 ∈ ℂ)
1615negcld 8024 . . . . . 6 ((𝑧 ∈ ℝ ∧ 𝑦 ∈ ℝ) → -𝑧 ∈ ℂ)
177adantl 273 . . . . . . 7 ((𝑧 ∈ ℝ ∧ 𝑦 ∈ ℝ) → 𝑦 ∈ ℂ)
1817negcld 8024 . . . . . 6 ((𝑧 ∈ ℝ ∧ 𝑦 ∈ ℝ) → -𝑦 ∈ ℂ)
19 brcnvg 4688 . . . . . 6 ((-𝑧 ∈ ℂ ∧ -𝑦 ∈ ℂ) → (-𝑧 < -𝑦 ↔ -𝑦 < -𝑧))
2016, 18, 19syl2anc 406 . . . . 5 ((𝑧 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (-𝑧 < -𝑦 ↔ -𝑦 < -𝑧))
211a1i 9 . . . . . . 7 ((𝑧 ∈ ℝ ∧ 𝑦 ∈ ℝ) → 𝐹 = (𝑥 ∈ ℝ ↦ -𝑥))
22 negeq 7919 . . . . . . . 8 (𝑥 = 𝑧 → -𝑥 = -𝑧)
2322adantl 273 . . . . . . 7 (((𝑧 ∈ ℝ ∧ 𝑦 ∈ ℝ) ∧ 𝑥 = 𝑧) → -𝑥 = -𝑧)
2421, 23, 14, 16fvmptd 5468 . . . . . 6 ((𝑧 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (𝐹𝑧) = -𝑧)
25 negeq 7919 . . . . . . . 8 (𝑥 = 𝑦 → -𝑥 = -𝑦)
2625adantl 273 . . . . . . 7 (((𝑧 ∈ ℝ ∧ 𝑦 ∈ ℝ) ∧ 𝑥 = 𝑦) → -𝑥 = -𝑦)
27 simpr 109 . . . . . . 7 ((𝑧 ∈ ℝ ∧ 𝑦 ∈ ℝ) → 𝑦 ∈ ℝ)
2821, 26, 27, 18fvmptd 5468 . . . . . 6 ((𝑧 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (𝐹𝑦) = -𝑦)
2924, 28breq12d 3910 . . . . 5 ((𝑧 ∈ ℝ ∧ 𝑦 ∈ ℝ) → ((𝐹𝑧) < (𝐹𝑦) ↔ -𝑧 < -𝑦))
30 ltneg 8188 . . . . 5 ((𝑧 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (𝑧 < 𝑦 ↔ -𝑦 < -𝑧))
3120, 29, 303bitr4rd 220 . . . 4 ((𝑧 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (𝑧 < 𝑦 ↔ (𝐹𝑧) < (𝐹𝑦)))
3231rgen2a 2461 . . 3 𝑧 ∈ ℝ ∀𝑦 ∈ ℝ (𝑧 < 𝑦 ↔ (𝐹𝑧) < (𝐹𝑦))
33 df-isom 5100 . . 3 (𝐹 Isom < , < (ℝ, ℝ) ↔ (𝐹:ℝ–1-1-onto→ℝ ∧ ∀𝑧 ∈ ℝ ∀𝑦 ∈ ℝ (𝑧 < 𝑦 ↔ (𝐹𝑧) < (𝐹𝑦))))
3413, 32, 33mpbir2an 909 . 2 𝐹 Isom < , < (ℝ, ℝ)
35 negeq 7919 . . . 4 (𝑦 = 𝑥 → -𝑦 = -𝑥)
3635cbvmptv 3992 . . 3 (𝑦 ∈ ℝ ↦ -𝑦) = (𝑥 ∈ ℝ ↦ -𝑥)
3712simpri 112 . . 3 𝐹 = (𝑦 ∈ ℝ ↦ -𝑦)
3836, 37, 13eqtr4i 2146 . 2 𝐹 = 𝐹
3934, 38pm3.2i 268 1 (𝐹 Isom < , < (ℝ, ℝ) ∧ 𝐹 = 𝐹)
Colors of variables: wff set class
Syntax hints:  wa 103  wb 104   = wceq 1314  wtru 1315  wcel 1463  wral 2391   class class class wbr 3897  cmpt 3957  ccnv 4506  1-1-ontowf1o 5090  cfv 5091   Isom wiso 5092  cc 7582  cr 7583   < clt 7764  -cneg 7898
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 586  ax-in2 587  ax-io 681  ax-5 1406  ax-7 1407  ax-gen 1408  ax-ie1 1452  ax-ie2 1453  ax-8 1465  ax-10 1466  ax-11 1467  ax-i12 1468  ax-bndl 1469  ax-4 1470  ax-13 1474  ax-14 1475  ax-17 1489  ax-i9 1493  ax-ial 1497  ax-i5r 1498  ax-ext 2097  ax-sep 4014  ax-pow 4066  ax-pr 4099  ax-un 4323  ax-setind 4420  ax-cnex 7675  ax-resscn 7676  ax-1cn 7677  ax-1re 7678  ax-icn 7679  ax-addcl 7680  ax-addrcl 7681  ax-mulcl 7682  ax-addcom 7684  ax-addass 7686  ax-distr 7688  ax-i2m1 7689  ax-0id 7692  ax-rnegex 7693  ax-cnre 7695  ax-pre-ltadd 7700
This theorem depends on definitions:  df-bi 116  df-3an 947  df-tru 1317  df-fal 1320  df-nf 1420  df-sb 1719  df-eu 1978  df-mo 1979  df-clab 2102  df-cleq 2108  df-clel 2111  df-nfc 2245  df-ne 2284  df-nel 2379  df-ral 2396  df-rex 2397  df-reu 2398  df-rab 2400  df-v 2660  df-sbc 2881  df-csb 2974  df-dif 3041  df-un 3043  df-in 3045  df-ss 3052  df-pw 3480  df-sn 3501  df-pr 3502  df-op 3504  df-uni 3705  df-br 3898  df-opab 3958  df-mpt 3959  df-id 4183  df-xp 4513  df-rel 4514  df-cnv 4515  df-co 4516  df-dm 4517  df-rn 4518  df-iota 5056  df-fun 5093  df-fn 5094  df-f 5095  df-f1 5096  df-fo 5097  df-f1o 5098  df-fv 5099  df-isom 5100  df-riota 5696  df-ov 5743  df-oprab 5744  df-mpo 5745  df-pnf 7766  df-mnf 7767  df-ltxr 7769  df-sub 7899  df-neg 7900
This theorem is referenced by:  infrenegsupex  9341
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