Theorem negiso 8871

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.

Step	Hyp	Ref	Expression
1		negiso.1	. . . . . 6 ⊢ 𝐹 = (𝑥 ∈ ℝ ↦ -𝑥)
2		simpr 109	. . . . . . 7 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ) → 𝑥 ∈ ℝ)
3	2	renegcld 8299	. . . . . 6 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ) → -𝑥 ∈ ℝ)
4		simpr 109	. . . . . . 7 ⊢ ((⊤ ∧ 𝑦 ∈ ℝ) → 𝑦 ∈ ℝ)
5	4	renegcld 8299	. . . . . 6 ⊢ ((⊤ ∧ 𝑦 ∈ ℝ) → -𝑦 ∈ ℝ)
6		recn 7907	. . . . . . . 8 ⊢ (𝑥 ∈ ℝ → 𝑥 ∈ ℂ)
7		recn 7907	. . . . . . . 8 ⊢ (𝑦 ∈ ℝ → 𝑦 ∈ ℂ)
8		negcon2 8172	. . . . . . . 8 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ) → (𝑥 = -𝑦 ↔ 𝑦 = -𝑥))
9	6, 7, 8	syl2an 287	. . . . . . 7 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (𝑥 = -𝑦 ↔ 𝑦 = -𝑥))
10	9	adantl 275	. . . . . 6 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) → (𝑥 = -𝑦 ↔ 𝑦 = -𝑥))
11	1, 3, 5, 10	f1ocnv2d 6053	. . . . 5 ⊢ (⊤ → (𝐹:ℝ–1-1-onto→ℝ ∧ ◡𝐹 = (𝑦 ∈ ℝ ↦ -𝑦)))
12	11	mptru 1357	. . . 4 ⊢ (𝐹:ℝ–1-1-onto→ℝ ∧ ◡𝐹 = (𝑦 ∈ ℝ ↦ -𝑦))
13	12	simpli 110	. . 3 ⊢ 𝐹:ℝ–1-1-onto→ℝ
14		simpl 108	. . . . . . . 8 ⊢ ((𝑧 ∈ ℝ ∧ 𝑦 ∈ ℝ) → 𝑧 ∈ ℝ)
15	14	recnd 7948	. . . . . . 7 ⊢ ((𝑧 ∈ ℝ ∧ 𝑦 ∈ ℝ) → 𝑧 ∈ ℂ)
16	15	negcld 8217	. . . . . 6 ⊢ ((𝑧 ∈ ℝ ∧ 𝑦 ∈ ℝ) → -𝑧 ∈ ℂ)
17	7	adantl 275	. . . . . . 7 ⊢ ((𝑧 ∈ ℝ ∧ 𝑦 ∈ ℝ) → 𝑦 ∈ ℂ)
18	17	negcld 8217	. . . . . 6 ⊢ ((𝑧 ∈ ℝ ∧ 𝑦 ∈ ℝ) → -𝑦 ∈ ℂ)
19		brcnvg 4792	. . . . . 6 ⊢ ((-𝑧 ∈ ℂ ∧ -𝑦 ∈ ℂ) → (-𝑧◡ < -𝑦 ↔ -𝑦 < -𝑧))
20	16, 18, 19	syl2anc 409	. . . . 5 ⊢ ((𝑧 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (-𝑧◡ < -𝑦 ↔ -𝑦 < -𝑧))
21	1	a1i 9	. . . . . . 7 ⊢ ((𝑧 ∈ ℝ ∧ 𝑦 ∈ ℝ) → 𝐹 = (𝑥 ∈ ℝ ↦ -𝑥))
22		negeq 8112	. . . . . . . 8 ⊢ (𝑥 = 𝑧 → -𝑥 = -𝑧)
23	22	adantl 275	. . . . . . 7 ⊢ (((𝑧 ∈ ℝ ∧ 𝑦 ∈ ℝ) ∧ 𝑥 = 𝑧) → -𝑥 = -𝑧)
24	21, 23, 14, 16	fvmptd 5577	. . . . . 6 ⊢ ((𝑧 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (𝐹‘𝑧) = -𝑧)
25		negeq 8112	. . . . . . . 8 ⊢ (𝑥 = 𝑦 → -𝑥 = -𝑦)
26	25	adantl 275	. . . . . . 7 ⊢ (((𝑧 ∈ ℝ ∧ 𝑦 ∈ ℝ) ∧ 𝑥 = 𝑦) → -𝑥 = -𝑦)
27		simpr 109	. . . . . . 7 ⊢ ((𝑧 ∈ ℝ ∧ 𝑦 ∈ ℝ) → 𝑦 ∈ ℝ)
28	21, 26, 27, 18	fvmptd 5577	. . . . . 6 ⊢ ((𝑧 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (𝐹‘𝑦) = -𝑦)
29	24, 28	breq12d 4002	. . . . 5 ⊢ ((𝑧 ∈ ℝ ∧ 𝑦 ∈ ℝ) → ((𝐹‘𝑧)◡ < (𝐹‘𝑦) ↔ -𝑧◡ < -𝑦))
30		ltneg 8381	. . . . 5 ⊢ ((𝑧 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (𝑧 < 𝑦 ↔ -𝑦 < -𝑧))
31	20, 29, 30	3bitr4rd 220	. . . 4 ⊢ ((𝑧 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (𝑧 < 𝑦 ↔ (𝐹‘𝑧)◡ < (𝐹‘𝑦)))
32	31	rgen2a 2524	. . 3 ⊢ ∀𝑧 ∈ ℝ ∀𝑦 ∈ ℝ (𝑧 < 𝑦 ↔ (𝐹‘𝑧)◡ < (𝐹‘𝑦))
33		df-isom 5207	. . 3 ⊢ (𝐹 Isom < , ◡ < (ℝ, ℝ) ↔ (𝐹:ℝ–1-1-onto→ℝ ∧ ∀𝑧 ∈ ℝ ∀𝑦 ∈ ℝ (𝑧 < 𝑦 ↔ (𝐹‘𝑧)◡ < (𝐹‘𝑦))))
34	13, 32, 33	mpbir2an 937	. 2 ⊢ 𝐹 Isom < , ◡ < (ℝ, ℝ)
35		negeq 8112	. . . 4 ⊢ (𝑦 = 𝑥 → -𝑦 = -𝑥)
36	35	cbvmptv 4085	. . 3 ⊢ (𝑦 ∈ ℝ ↦ -𝑦) = (𝑥 ∈ ℝ ↦ -𝑥)
37	12	simpri 112	. . 3 ⊢ ◡𝐹 = (𝑦 ∈ ℝ ↦ -𝑦)
38	36, 37, 1	3eqtr4i 2201	. 2 ⊢ ◡𝐹 = 𝐹
39	34, 38	pm3.2i 270	1 ⊢ (𝐹 Isom < , ◡ < (ℝ, ℝ) ∧ ◡𝐹 = 𝐹)

Syntax hints:   ∧ wa 103   ↔ wb 104   = wceq 1348  ⊤wtru 1349   ∈ wcel 2141  ∀wral 2448   class class class wbr 3989   ↦ cmpt 4050  ^◡ccnv 4610  –1-1-onto→wf1o 5197  ‘cfv 5198   Isom wiso 5199  ℂcc 7772  ℝcr 7773   < clt 7954  -cneg 8091

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 609  ax-in2 610  ax-io 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-13 2143  ax-14 2144  ax-ext 2152  ax-sep 4107  ax-pow 4160  ax-pr 4194  ax-un 4418  ax-setind 4521  ax-cnex 7865  ax-resscn 7866  ax-1cn 7867  ax-1re 7868  ax-icn 7869  ax-addcl 7870  ax-addrcl 7871  ax-mulcl 7872  ax-addcom 7874  ax-addass 7876  ax-distr 7878  ax-i2m1 7879  ax-0id 7882  ax-rnegex 7883  ax-cnre 7885  ax-pre-ltadd 7890

This theorem depends on definitions:  df-bi 116  df-3an 975  df-tru 1351  df-fal 1354  df-nf 1454  df-sb 1756  df-eu 2022  df-mo 2023  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-ne 2341  df-nel 2436  df-ral 2453  df-rex 2454  df-reu 2455  df-rab 2457  df-v 2732  df-sbc 2956  df-csb 3050  df-dif 3123  df-un 3125  df-in 3127  df-ss 3134  df-pw 3568  df-sn 3589  df-pr 3590  df-op 3592  df-uni 3797  df-br 3990  df-opab 4051  df-mpt 4052  df-id 4278  df-xp 4617  df-rel 4618  df-cnv 4619  df-co 4620  df-dm 4621  df-rn 4622  df-iota 5160  df-fun 5200  df-fn 5201  df-f 5202  df-f1 5203  df-fo 5204  df-f1o 5205  df-fv 5206  df-isom 5207  df-riota 5809  df-ov 5856  df-oprab 5857  df-mpo 5858  df-pnf 7956  df-mnf 7957  df-ltxr 7959  df-sub 8092  df-neg 8093

This theorem is referenced by:  infrenegsupex  9553