Theorem xrltnr 10014

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 10011	. 2 ⊢ (𝐴 ∈ ℝ* ↔ (𝐴 ∈ ℝ ∨ 𝐴 = +∞ ∨ 𝐴 = -∞))
2		ltnr 8256	. . 3 ⊢ (𝐴 ∈ ℝ → ¬ 𝐴 < 𝐴)
3		pnfnre 8221	. . . . . . . . . 10 ⊢ +∞ ∉ ℝ
4	3	neli 2499	. . . . . . . . 9 ⊢ ¬ +∞ ∈ ℝ
5	4	intnan 936	. . . . . . . 8 ⊢ ¬ (+∞ ∈ ℝ ∧ +∞ ∈ ℝ)
6	5	intnanr 937	. . . . . . 7 ⊢ ¬ ((+∞ ∈ ℝ ∧ +∞ ∈ ℝ) ∧ +∞ <ℝ +∞)
7		pnfnemnf 8234	. . . . . . . . 9 ⊢ +∞ ≠ -∞
8	7	neii 2404	. . . . . . . 8 ⊢ ¬ +∞ = -∞
9	8	intnanr 937	. . . . . . 7 ⊢ ¬ (+∞ = -∞ ∧ +∞ = +∞)
10	6, 9	pm3.2ni 820	. . . . . 6 ⊢ ¬ (((+∞ ∈ ℝ ∧ +∞ ∈ ℝ) ∧ +∞ <ℝ +∞) ∨ (+∞ = -∞ ∧ +∞ = +∞))
11	4	intnanr 937	. . . . . . 7 ⊢ ¬ (+∞ ∈ ℝ ∧ +∞ = +∞)
12	4	intnan 936	. . . . . . 7 ⊢ ¬ (+∞ = -∞ ∧ +∞ ∈ ℝ)
13	11, 12	pm3.2ni 820	. . . . . 6 ⊢ ¬ ((+∞ ∈ ℝ ∧ +∞ = +∞) ∨ (+∞ = -∞ ∧ +∞ ∈ ℝ))
14	10, 13	pm3.2ni 820	. . . . 5 ⊢ ¬ ((((+∞ ∈ ℝ ∧ +∞ ∈ ℝ) ∧ +∞ <ℝ +∞) ∨ (+∞ = -∞ ∧ +∞ = +∞)) ∨ ((+∞ ∈ ℝ ∧ +∞ = +∞) ∨ (+∞ = -∞ ∧ +∞ ∈ ℝ)))
15		pnfxr 8232	. . . . . 6 ⊢ +∞ ∈ ℝ*
16		ltxr 10010	. . . . . 6 ⊢ ((+∞ ∈ ℝ* ∧ +∞ ∈ ℝ*) → (+∞ < +∞ ↔ ((((+∞ ∈ ℝ ∧ +∞ ∈ ℝ) ∧ +∞ <ℝ +∞) ∨ (+∞ = -∞ ∧ +∞ = +∞)) ∨ ((+∞ ∈ ℝ ∧ +∞ = +∞) ∨ (+∞ = -∞ ∧ +∞ ∈ ℝ)))))
17	15, 15, 16	mp2an 426	. . . . 5 ⊢ (+∞ < +∞ ↔ ((((+∞ ∈ ℝ ∧ +∞ ∈ ℝ) ∧ +∞ <ℝ +∞) ∨ (+∞ = -∞ ∧ +∞ = +∞)) ∨ ((+∞ ∈ ℝ ∧ +∞ = +∞) ∨ (+∞ = -∞ ∧ +∞ ∈ ℝ))))
18	14, 17	mtbir 677	. . . 4 ⊢ ¬ +∞ < +∞
19		breq12 4093	. . . . 5 ⊢ ((𝐴 = +∞ ∧ 𝐴 = +∞) → (𝐴 < 𝐴 ↔ +∞ < +∞))
20	19	anidms 397	. . . 4 ⊢ (𝐴 = +∞ → (𝐴 < 𝐴 ↔ +∞ < +∞))
21	18, 20	mtbiri 681	. . 3 ⊢ (𝐴 = +∞ → ¬ 𝐴 < 𝐴)
22		mnfnre 8222	. . . . . . . . . 10 ⊢ -∞ ∉ ℝ
23	22	neli 2499	. . . . . . . . 9 ⊢ ¬ -∞ ∈ ℝ
24	23	intnan 936	. . . . . . . 8 ⊢ ¬ (-∞ ∈ ℝ ∧ -∞ ∈ ℝ)
25	24	intnanr 937	. . . . . . 7 ⊢ ¬ ((-∞ ∈ ℝ ∧ -∞ ∈ ℝ) ∧ -∞ <ℝ -∞)
26	7	nesymi 2448	. . . . . . . 8 ⊢ ¬ -∞ = +∞
27	26	intnan 936	. . . . . . 7 ⊢ ¬ (-∞ = -∞ ∧ -∞ = +∞)
28	25, 27	pm3.2ni 820	. . . . . 6 ⊢ ¬ (((-∞ ∈ ℝ ∧ -∞ ∈ ℝ) ∧ -∞ <ℝ -∞) ∨ (-∞ = -∞ ∧ -∞ = +∞))
29	23	intnanr 937	. . . . . . 7 ⊢ ¬ (-∞ ∈ ℝ ∧ -∞ = +∞)
30	23	intnan 936	. . . . . . 7 ⊢ ¬ (-∞ = -∞ ∧ -∞ ∈ ℝ)
31	29, 30	pm3.2ni 820	. . . . . 6 ⊢ ¬ ((-∞ ∈ ℝ ∧ -∞ = +∞) ∨ (-∞ = -∞ ∧ -∞ ∈ ℝ))
32	28, 31	pm3.2ni 820	. . . . 5 ⊢ ¬ ((((-∞ ∈ ℝ ∧ -∞ ∈ ℝ) ∧ -∞ <ℝ -∞) ∨ (-∞ = -∞ ∧ -∞ = +∞)) ∨ ((-∞ ∈ ℝ ∧ -∞ = +∞) ∨ (-∞ = -∞ ∧ -∞ ∈ ℝ)))
33		mnfxr 8236	. . . . . 6 ⊢ -∞ ∈ ℝ*
34		ltxr 10010	. . . . . 6 ⊢ ((-∞ ∈ ℝ* ∧ -∞ ∈ ℝ*) → (-∞ < -∞ ↔ ((((-∞ ∈ ℝ ∧ -∞ ∈ ℝ) ∧ -∞ <ℝ -∞) ∨ (-∞ = -∞ ∧ -∞ = +∞)) ∨ ((-∞ ∈ ℝ ∧ -∞ = +∞) ∨ (-∞ = -∞ ∧ -∞ ∈ ℝ)))))
35	33, 33, 34	mp2an 426	. . . . 5 ⊢ (-∞ < -∞ ↔ ((((-∞ ∈ ℝ ∧ -∞ ∈ ℝ) ∧ -∞ <ℝ -∞) ∨ (-∞ = -∞ ∧ -∞ = +∞)) ∨ ((-∞ ∈ ℝ ∧ -∞ = +∞) ∨ (-∞ = -∞ ∧ -∞ ∈ ℝ))))
36	32, 35	mtbir 677	. . . 4 ⊢ ¬ -∞ < -∞
37		breq12 4093	. . . . 5 ⊢ ((𝐴 = -∞ ∧ 𝐴 = -∞) → (𝐴 < 𝐴 ↔ -∞ < -∞))
38	37	anidms 397	. . . 4 ⊢ (𝐴 = -∞ → (𝐴 < 𝐴 ↔ -∞ < -∞))
39	36, 38	mtbiri 681	. . 3 ⊢ (𝐴 = -∞ → ¬ 𝐴 < 𝐴)
40	2, 21, 39	3jaoi 1339	. 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 715   ∨ w3o 1003   = wceq 1397   ∈ wcel 2202   class class class wbr 4088  ℝcr 8031   <_ℝ cltrr 8036  +∞cpnf 8211  -∞cmnf 8212  ℝ^*cxr 8213   < clt 8214

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 619  ax-in2 620  ax-io 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-13 2204  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-pow 4264  ax-pr 4299  ax-un 4530  ax-setind 4635  ax-cnex 8123  ax-resscn 8124  ax-pre-ltirr 8144

This theorem depends on definitions:  df-bi 117  df-3or 1005  df-3an 1006  df-tru 1400  df-fal 1403  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ne 2403  df-nel 2498  df-ral 2515  df-rex 2516  df-rab 2519  df-v 2804  df-dif 3202  df-un 3204  df-in 3206  df-ss 3213  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-br 4089  df-opab 4151  df-xp 4731  df-pnf 8216  df-mnf 8217  df-xr 8218  df-ltxr 8219

This theorem is referenced by:  xrltnsym  10028  xrltso  10031  xrlttri3  10032  xrleid  10035  xrltne  10048  nltpnft  10049  ngtmnft  10052  xrrebnd  10054  xposdif  10117  lbioog  10148  ubioog  10149  xrmaxleim  11809  xrmaxiflemlub  11813