Theorem xrltnr 9845

Description: The extended real 'less than' is irreflexive. (Contributed by NM, 14-Oct-2005.)

Assertion

Ref	Expression
xrltnr	⊢ (𝐴 ∈ ℝ* → ¬ 𝐴 < 𝐴)

Proof of Theorem xrltnr

Step	Hyp	Ref	Expression
1		elxr 9842	. 2 ⊢ (𝐴 ∈ ℝ* ↔ (𝐴 ∈ ℝ ∨ 𝐴 = +∞ ∨ 𝐴 = -∞))
2		ltnr 8096	. . 3 ⊢ (𝐴 ∈ ℝ → ¬ 𝐴 < 𝐴)
3		pnfnre 8061	. . . . . . . . . 10 ⊢ +∞ ∉ ℝ
4	3	neli 2461	. . . . . . . . 9 ⊢ ¬ +∞ ∈ ℝ
5	4	intnan 930	. . . . . . . 8 ⊢ ¬ (+∞ ∈ ℝ ∧ +∞ ∈ ℝ)
6	5	intnanr 931	. . . . . . 7 ⊢ ¬ ((+∞ ∈ ℝ ∧ +∞ ∈ ℝ) ∧ +∞ <ℝ +∞)
7		pnfnemnf 8074	. . . . . . . . 9 ⊢ +∞ ≠ -∞
8	7	neii 2366	. . . . . . . 8 ⊢ ¬ +∞ = -∞
9	8	intnanr 931	. . . . . . 7 ⊢ ¬ (+∞ = -∞ ∧ +∞ = +∞)
10	6, 9	pm3.2ni 814	. . . . . 6 ⊢ ¬ (((+∞ ∈ ℝ ∧ +∞ ∈ ℝ) ∧ +∞ <ℝ +∞) ∨ (+∞ = -∞ ∧ +∞ = +∞))
11	4	intnanr 931	. . . . . . 7 ⊢ ¬ (+∞ ∈ ℝ ∧ +∞ = +∞)
12	4	intnan 930	. . . . . . 7 ⊢ ¬ (+∞ = -∞ ∧ +∞ ∈ ℝ)
13	11, 12	pm3.2ni 814	. . . . . 6 ⊢ ¬ ((+∞ ∈ ℝ ∧ +∞ = +∞) ∨ (+∞ = -∞ ∧ +∞ ∈ ℝ))
14	10, 13	pm3.2ni 814	. . . . 5 ⊢ ¬ ((((+∞ ∈ ℝ ∧ +∞ ∈ ℝ) ∧ +∞ <ℝ +∞) ∨ (+∞ = -∞ ∧ +∞ = +∞)) ∨ ((+∞ ∈ ℝ ∧ +∞ = +∞) ∨ (+∞ = -∞ ∧ +∞ ∈ ℝ)))
15		pnfxr 8072	. . . . . 6 ⊢ +∞ ∈ ℝ*
16		ltxr 9841	. . . . . 6 ⊢ ((+∞ ∈ ℝ* ∧ +∞ ∈ ℝ*) → (+∞ < +∞ ↔ ((((+∞ ∈ ℝ ∧ +∞ ∈ ℝ) ∧ +∞ <ℝ +∞) ∨ (+∞ = -∞ ∧ +∞ = +∞)) ∨ ((+∞ ∈ ℝ ∧ +∞ = +∞) ∨ (+∞ = -∞ ∧ +∞ ∈ ℝ)))))
17	15, 15, 16	mp2an 426	. . . . 5 ⊢ (+∞ < +∞ ↔ ((((+∞ ∈ ℝ ∧ +∞ ∈ ℝ) ∧ +∞ <ℝ +∞) ∨ (+∞ = -∞ ∧ +∞ = +∞)) ∨ ((+∞ ∈ ℝ ∧ +∞ = +∞) ∨ (+∞ = -∞ ∧ +∞ ∈ ℝ))))
18	14, 17	mtbir 672	. . . 4 ⊢ ¬ +∞ < +∞
19		breq12 4034	. . . . 5 ⊢ ((𝐴 = +∞ ∧ 𝐴 = +∞) → (𝐴 < 𝐴 ↔ +∞ < +∞))
20	19	anidms 397	. . . 4 ⊢ (𝐴 = +∞ → (𝐴 < 𝐴 ↔ +∞ < +∞))
21	18, 20	mtbiri 676	. . 3 ⊢ (𝐴 = +∞ → ¬ 𝐴 < 𝐴)
22		mnfnre 8062	. . . . . . . . . 10 ⊢ -∞ ∉ ℝ
23	22	neli 2461	. . . . . . . . 9 ⊢ ¬ -∞ ∈ ℝ
24	23	intnan 930	. . . . . . . 8 ⊢ ¬ (-∞ ∈ ℝ ∧ -∞ ∈ ℝ)
25	24	intnanr 931	. . . . . . 7 ⊢ ¬ ((-∞ ∈ ℝ ∧ -∞ ∈ ℝ) ∧ -∞ <ℝ -∞)
26	7	nesymi 2410	. . . . . . . 8 ⊢ ¬ -∞ = +∞
27	26	intnan 930	. . . . . . 7 ⊢ ¬ (-∞ = -∞ ∧ -∞ = +∞)
28	25, 27	pm3.2ni 814	. . . . . 6 ⊢ ¬ (((-∞ ∈ ℝ ∧ -∞ ∈ ℝ) ∧ -∞ <ℝ -∞) ∨ (-∞ = -∞ ∧ -∞ = +∞))
29	23	intnanr 931	. . . . . . 7 ⊢ ¬ (-∞ ∈ ℝ ∧ -∞ = +∞)
30	23	intnan 930	. . . . . . 7 ⊢ ¬ (-∞ = -∞ ∧ -∞ ∈ ℝ)
31	29, 30	pm3.2ni 814	. . . . . 6 ⊢ ¬ ((-∞ ∈ ℝ ∧ -∞ = +∞) ∨ (-∞ = -∞ ∧ -∞ ∈ ℝ))
32	28, 31	pm3.2ni 814	. . . . 5 ⊢ ¬ ((((-∞ ∈ ℝ ∧ -∞ ∈ ℝ) ∧ -∞ <ℝ -∞) ∨ (-∞ = -∞ ∧ -∞ = +∞)) ∨ ((-∞ ∈ ℝ ∧ -∞ = +∞) ∨ (-∞ = -∞ ∧ -∞ ∈ ℝ)))
33		mnfxr 8076	. . . . . 6 ⊢ -∞ ∈ ℝ*
34		ltxr 9841	. . . . . 6 ⊢ ((-∞ ∈ ℝ* ∧ -∞ ∈ ℝ*) → (-∞ < -∞ ↔ ((((-∞ ∈ ℝ ∧ -∞ ∈ ℝ) ∧ -∞ <ℝ -∞) ∨ (-∞ = -∞ ∧ -∞ = +∞)) ∨ ((-∞ ∈ ℝ ∧ -∞ = +∞) ∨ (-∞ = -∞ ∧ -∞ ∈ ℝ)))))
35	33, 33, 34	mp2an 426	. . . . 5 ⊢ (-∞ < -∞ ↔ ((((-∞ ∈ ℝ ∧ -∞ ∈ ℝ) ∧ -∞ <ℝ -∞) ∨ (-∞ = -∞ ∧ -∞ = +∞)) ∨ ((-∞ ∈ ℝ ∧ -∞ = +∞) ∨ (-∞ = -∞ ∧ -∞ ∈ ℝ))))
36	32, 35	mtbir 672	. . . 4 ⊢ ¬ -∞ < -∞
37		breq12 4034	. . . . 5 ⊢ ((𝐴 = -∞ ∧ 𝐴 = -∞) → (𝐴 < 𝐴 ↔ -∞ < -∞))
38	37	anidms 397	. . . 4 ⊢ (𝐴 = -∞ → (𝐴 < 𝐴 ↔ -∞ < -∞))
39	36, 38	mtbiri 676	. . 3 ⊢ (𝐴 = -∞ → ¬ 𝐴 < 𝐴)
40	2, 21, 39	3jaoi 1314	. 2 ⊢ ((𝐴 ∈ ℝ ∨ 𝐴 = +∞ ∨ 𝐴 = -∞) → ¬ 𝐴 < 𝐴)
41	1, 40	sylbi 121	1 ⊢ (𝐴 ∈ ℝ* → ¬ 𝐴 < 𝐴)

Syntax hints:  ¬ wn 3   → wi 4   ∧ wa 104   ↔ wb 105   ∨ wo 709   ∨ w3o 979   = wceq 1364   ∈ wcel 2164   class class class wbr 4029  ℝcr 7871   <_ℝ cltrr 7876  +∞cpnf 8051  -∞cmnf 8052  ℝ^*cxr 8053   < clt 8054

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 615  ax-in2 616  ax-io 710  ax-5 1458  ax-7 1459  ax-gen 1460  ax-ie1 1504  ax-ie2 1505  ax-8 1515  ax-10 1516  ax-11 1517  ax-i12 1518  ax-bndl 1520  ax-4 1521  ax-17 1537  ax-i9 1541  ax-ial 1545  ax-i5r 1546  ax-13 2166  ax-14 2167  ax-ext 2175  ax-sep 4147  ax-pow 4203  ax-pr 4238  ax-un 4464  ax-setind 4569  ax-cnex 7963  ax-resscn 7964  ax-pre-ltirr 7984

This theorem depends on definitions:  df-bi 117  df-3or 981  df-3an 982  df-tru 1367  df-fal 1370  df-nf 1472  df-sb 1774  df-eu 2045  df-mo 2046  df-clab 2180  df-cleq 2186  df-clel 2189  df-nfc 2325  df-ne 2365  df-nel 2460  df-ral 2477  df-rex 2478  df-rab 2481  df-v 2762  df-dif 3155  df-un 3157  df-in 3159  df-ss 3166  df-pw 3603  df-sn 3624  df-pr 3625  df-op 3627  df-uni 3836  df-br 4030  df-opab 4091  df-xp 4665  df-pnf 8056  df-mnf 8057  df-xr 8058  df-ltxr 8059

This theorem is referenced by:  xrltnsym  9859  xrltso  9862  xrlttri3  9863  xrleid  9866  xrltne  9879  nltpnft  9880  ngtmnft  9883  xrrebnd  9885  xposdif  9948  lbioog  9979  ubioog  9980  xrmaxleim  11387  xrmaxiflemlub  11391