Theorem xrltnr 10111

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 10108	. 2 ⊢ (𝐴 ∈ ℝ* ↔ (𝐴 ∈ ℝ ∨ 𝐴 = +∞ ∨ 𝐴 = -∞))
2		ltnr 8349	. . 3 ⊢ (𝐴 ∈ ℝ → ¬ 𝐴 < 𝐴)
3		pnfnre 8314	. . . . . . . . . 10 ⊢ +∞ ∉ ℝ
4	3	neli 2509	. . . . . . . . 9 ⊢ ¬ +∞ ∈ ℝ
5	4	intnan 937	. . . . . . . 8 ⊢ ¬ (+∞ ∈ ℝ ∧ +∞ ∈ ℝ)
6	5	intnanr 938	. . . . . . 7 ⊢ ¬ ((+∞ ∈ ℝ ∧ +∞ ∈ ℝ) ∧ +∞ <ℝ +∞)
7		pnfnemnf 8327	. . . . . . . . 9 ⊢ +∞ ≠ -∞
8	7	neii 2414	. . . . . . . 8 ⊢ ¬ +∞ = -∞
9	8	intnanr 938	. . . . . . 7 ⊢ ¬ (+∞ = -∞ ∧ +∞ = +∞)
10	6, 9	pm3.2ni 821	. . . . . 6 ⊢ ¬ (((+∞ ∈ ℝ ∧ +∞ ∈ ℝ) ∧ +∞ <ℝ +∞) ∨ (+∞ = -∞ ∧ +∞ = +∞))
11	4	intnanr 938	. . . . . . 7 ⊢ ¬ (+∞ ∈ ℝ ∧ +∞ = +∞)
12	4	intnan 937	. . . . . . 7 ⊢ ¬ (+∞ = -∞ ∧ +∞ ∈ ℝ)
13	11, 12	pm3.2ni 821	. . . . . 6 ⊢ ¬ ((+∞ ∈ ℝ ∧ +∞ = +∞) ∨ (+∞ = -∞ ∧ +∞ ∈ ℝ))
14	10, 13	pm3.2ni 821	. . . . 5 ⊢ ¬ ((((+∞ ∈ ℝ ∧ +∞ ∈ ℝ) ∧ +∞ <ℝ +∞) ∨ (+∞ = -∞ ∧ +∞ = +∞)) ∨ ((+∞ ∈ ℝ ∧ +∞ = +∞) ∨ (+∞ = -∞ ∧ +∞ ∈ ℝ)))
15		pnfxr 8325	. . . . . 6 ⊢ +∞ ∈ ℝ*
16		ltxr 10107	. . . . . 6 ⊢ ((+∞ ∈ ℝ* ∧ +∞ ∈ ℝ*) → (+∞ < +∞ ↔ ((((+∞ ∈ ℝ ∧ +∞ ∈ ℝ) ∧ +∞ <ℝ +∞) ∨ (+∞ = -∞ ∧ +∞ = +∞)) ∨ ((+∞ ∈ ℝ ∧ +∞ = +∞) ∨ (+∞ = -∞ ∧ +∞ ∈ ℝ)))))
17	15, 15, 16	mp2an 426	. . . . 5 ⊢ (+∞ < +∞ ↔ ((((+∞ ∈ ℝ ∧ +∞ ∈ ℝ) ∧ +∞ <ℝ +∞) ∨ (+∞ = -∞ ∧ +∞ = +∞)) ∨ ((+∞ ∈ ℝ ∧ +∞ = +∞) ∨ (+∞ = -∞ ∧ +∞ ∈ ℝ))))
18	14, 17	mtbir 678	. . . 4 ⊢ ¬ +∞ < +∞
19		breq12 4113	. . . . 5 ⊢ ((𝐴 = +∞ ∧ 𝐴 = +∞) → (𝐴 < 𝐴 ↔ +∞ < +∞))
20	19	anidms 397	. . . 4 ⊢ (𝐴 = +∞ → (𝐴 < 𝐴 ↔ +∞ < +∞))
21	18, 20	mtbiri 682	. . 3 ⊢ (𝐴 = +∞ → ¬ 𝐴 < 𝐴)
22		mnfnre 8315	. . . . . . . . . 10 ⊢ -∞ ∉ ℝ
23	22	neli 2509	. . . . . . . . 9 ⊢ ¬ -∞ ∈ ℝ
24	23	intnan 937	. . . . . . . 8 ⊢ ¬ (-∞ ∈ ℝ ∧ -∞ ∈ ℝ)
25	24	intnanr 938	. . . . . . 7 ⊢ ¬ ((-∞ ∈ ℝ ∧ -∞ ∈ ℝ) ∧ -∞ <ℝ -∞)
26	7	nesymi 2458	. . . . . . . 8 ⊢ ¬ -∞ = +∞
27	26	intnan 937	. . . . . . 7 ⊢ ¬ (-∞ = -∞ ∧ -∞ = +∞)
28	25, 27	pm3.2ni 821	. . . . . 6 ⊢ ¬ (((-∞ ∈ ℝ ∧ -∞ ∈ ℝ) ∧ -∞ <ℝ -∞) ∨ (-∞ = -∞ ∧ -∞ = +∞))
29	23	intnanr 938	. . . . . . 7 ⊢ ¬ (-∞ ∈ ℝ ∧ -∞ = +∞)
30	23	intnan 937	. . . . . . 7 ⊢ ¬ (-∞ = -∞ ∧ -∞ ∈ ℝ)
31	29, 30	pm3.2ni 821	. . . . . 6 ⊢ ¬ ((-∞ ∈ ℝ ∧ -∞ = +∞) ∨ (-∞ = -∞ ∧ -∞ ∈ ℝ))
32	28, 31	pm3.2ni 821	. . . . 5 ⊢ ¬ ((((-∞ ∈ ℝ ∧ -∞ ∈ ℝ) ∧ -∞ <ℝ -∞) ∨ (-∞ = -∞ ∧ -∞ = +∞)) ∨ ((-∞ ∈ ℝ ∧ -∞ = +∞) ∨ (-∞ = -∞ ∧ -∞ ∈ ℝ)))
33		mnfxr 8329	. . . . . 6 ⊢ -∞ ∈ ℝ*
34		ltxr 10107	. . . . . 6 ⊢ ((-∞ ∈ ℝ* ∧ -∞ ∈ ℝ*) → (-∞ < -∞ ↔ ((((-∞ ∈ ℝ ∧ -∞ ∈ ℝ) ∧ -∞ <ℝ -∞) ∨ (-∞ = -∞ ∧ -∞ = +∞)) ∨ ((-∞ ∈ ℝ ∧ -∞ = +∞) ∨ (-∞ = -∞ ∧ -∞ ∈ ℝ)))))
35	33, 33, 34	mp2an 426	. . . . 5 ⊢ (-∞ < -∞ ↔ ((((-∞ ∈ ℝ ∧ -∞ ∈ ℝ) ∧ -∞ <ℝ -∞) ∨ (-∞ = -∞ ∧ -∞ = +∞)) ∨ ((-∞ ∈ ℝ ∧ -∞ = +∞) ∨ (-∞ = -∞ ∧ -∞ ∈ ℝ))))
36	32, 35	mtbir 678	. . . 4 ⊢ ¬ -∞ < -∞
37		breq12 4113	. . . . 5 ⊢ ((𝐴 = -∞ ∧ 𝐴 = -∞) → (𝐴 < 𝐴 ↔ -∞ < -∞))
38	37	anidms 397	. . . 4 ⊢ (𝐴 = -∞ → (𝐴 < 𝐴 ↔ -∞ < -∞))
39	36, 38	mtbiri 682	. . 3 ⊢ (𝐴 = -∞ → ¬ 𝐴 < 𝐴)
40	2, 21, 39	3jaoi 1340	. 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 716   ∨ w3o 1004   = wceq 1398   ∈ wcel 2203   class class class wbr 4108  ℝcr 8125   <_ℝ cltrr 8130  +∞cpnf 8304  -∞cmnf 8305  ℝ^*cxr 8306   < clt 8307

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 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2205  ax-14 2206  ax-ext 2214  ax-sep 4227  ax-pow 4286  ax-pr 4321  ax-un 4553  ax-setind 4658  ax-cnex 8217  ax-resscn 8218  ax-pre-ltirr 8238

This theorem depends on definitions:  df-bi 117  df-3or 1006  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1812  df-eu 2083  df-mo 2084  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ne 2413  df-nel 2508  df-ral 2525  df-rex 2526  df-rab 2529  df-v 2814  df-dif 3212  df-un 3214  df-in 3216  df-ss 3223  df-pw 3670  df-sn 3694  df-pr 3695  df-op 3697  df-uni 3914  df-br 4109  df-opab 4171  df-xp 4754  df-pnf 8309  df-mnf 8310  df-xr 8311  df-ltxr 8312

This theorem is referenced by:  xrltnsym  10125  xrltso  10128  xrlttri3  10129  xrleid  10132  xrltne  10145  nltpnft  10146  ngtmnft  10149  xrrebnd  10151  xposdif  10214  lbioog  10245  ubioog  10246  xrmaxleim  11925  xrmaxiflemlub  11929