Theorem nltle2tri 39942

Description: Negated extended trichotomy law for 'less than' and 'less than or equal to'. (Contributed by AV, 18-Jul-2020.)

Assertion

Ref	Expression
nltle2tri	⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐶 ∈ ℝ*) → ¬ (𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶 ∧ 𝐶 ≤ 𝐴))

Proof of Theorem nltle2tri

Step	Hyp	Ref	Expression
1		xrltletr 11864	. 2 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐶 ∈ ℝ*) → ((𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) → 𝐴 < 𝐶))
2		id 22	. . . . . . . . . 10 ⊢ (((𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) → 𝐴 < 𝐶) → ((𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) → 𝐴 < 𝐶))
3	2	impcom 445	. . . . . . . . 9 ⊢ (((𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) ∧ ((𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) → 𝐴 < 𝐶)) → 𝐴 < 𝐶)
4		xrltnle 9984	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐶 ∈ ℝ*) → (𝐴 < 𝐶 ↔ ¬ 𝐶 ≤ 𝐴))
5	4	3adant2 1073	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐶 ∈ ℝ*) → (𝐴 < 𝐶 ↔ ¬ 𝐶 ≤ 𝐴))
6	5	biimpd 218	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐶 ∈ ℝ*) → (𝐴 < 𝐶 → ¬ 𝐶 ≤ 𝐴))
7	6	imp 444	. . . . . . . . . . 11 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐶 ∈ ℝ*) ∧ 𝐴 < 𝐶) → ¬ 𝐶 ≤ 𝐴)
8	7	olcd 407	. . . . . . . . . 10 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐶 ∈ ℝ*) ∧ 𝐴 < 𝐶) → (¬ (𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) ∨ ¬ 𝐶 ≤ 𝐴))
9	8	expcom 450	. . . . . . . . 9 ⊢ (𝐴 < 𝐶 → ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐶 ∈ ℝ*) → (¬ (𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) ∨ ¬ 𝐶 ≤ 𝐴)))
10	3, 9	syl 17	. . . . . . . 8 ⊢ (((𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) ∧ ((𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) → 𝐴 < 𝐶)) → ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐶 ∈ ℝ*) → (¬ (𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) ∨ ¬ 𝐶 ≤ 𝐴)))
11	10	ex 449	. . . . . . 7 ⊢ ((𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) → (((𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) → 𝐴 < 𝐶) → ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐶 ∈ ℝ*) → (¬ (𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) ∨ ¬ 𝐶 ≤ 𝐴))))
12	11	com23 84	. . . . . 6 ⊢ ((𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) → ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐶 ∈ ℝ*) → (((𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) → 𝐴 < 𝐶) → (¬ (𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) ∨ ¬ 𝐶 ≤ 𝐴))))
13	12	impd 446	. . . . 5 ⊢ ((𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) → (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐶 ∈ ℝ*) ∧ ((𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) → 𝐴 < 𝐶)) → (¬ (𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) ∨ ¬ 𝐶 ≤ 𝐴)))
14		id 22	. . . . . . 7 ⊢ (¬ (𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) → ¬ (𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶))
15	14	orcd 406	. . . . . 6 ⊢ (¬ (𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) → (¬ (𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) ∨ ¬ 𝐶 ≤ 𝐴))
16	15	a1d 25	. . . . 5 ⊢ (¬ (𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) → (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐶 ∈ ℝ*) ∧ ((𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) → 𝐴 < 𝐶)) → (¬ (𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) ∨ ¬ 𝐶 ≤ 𝐴)))
17	13, 16	pm2.61i 175	. . . 4 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐶 ∈ ℝ*) ∧ ((𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) → 𝐴 < 𝐶)) → (¬ (𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) ∨ ¬ 𝐶 ≤ 𝐴))
18		df-3an 1033	. . . . . 6 ⊢ ((𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶 ∧ 𝐶 ≤ 𝐴) ↔ ((𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) ∧ 𝐶 ≤ 𝐴))
19	18	notbii 309	. . . . 5 ⊢ (¬ (𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶 ∧ 𝐶 ≤ 𝐴) ↔ ¬ ((𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) ∧ 𝐶 ≤ 𝐴))
20		ianor 508	. . . . 5 ⊢ (¬ ((𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) ∧ 𝐶 ≤ 𝐴) ↔ (¬ (𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) ∨ ¬ 𝐶 ≤ 𝐴))
21	19, 20	bitri 263	. . . 4 ⊢ (¬ (𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶 ∧ 𝐶 ≤ 𝐴) ↔ (¬ (𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) ∨ ¬ 𝐶 ≤ 𝐴))
22	17, 21	sylibr 223	. . 3 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐶 ∈ ℝ*) ∧ ((𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) → 𝐴 < 𝐶)) → ¬ (𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶 ∧ 𝐶 ≤ 𝐴))
23	22	ex 449	. 2 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐶 ∈ ℝ*) → (((𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) → 𝐴 < 𝐶) → ¬ (𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶 ∧ 𝐶 ≤ 𝐴)))
24	1, 23	mpd 15	1 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐶 ∈ ℝ*) → ¬ (𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶 ∧ 𝐶 ≤ 𝐴))

Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 195   ∨ wo 382   ∧ wa 383   ∧ w3a 1031   ∈ wcel 1977   class class class wbr 4583  ℝ^*cxr 9952   < clt 9953   ≤ cle 9954

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-8 1979  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-sep 4709  ax-nul 4717  ax-pow 4769  ax-pr 4833  ax-un 6847  ax-cnex 9871  ax-resscn 9872  ax-pre-lttri 9889  ax-pre-lttrn 9890

This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3or 1032  df-3an 1033  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-nel 2783  df-ral 2901  df-rex 2902  df-rab 2905  df-v 3175  df-sbc 3403  df-csb 3500  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-nul 3875  df-if 4037  df-pw 4110  df-sn 4126  df-pr 4128  df-op 4132  df-uni 4373  df-br 4584  df-opab 4644  df-mpt 4645  df-id 4953  df-po 4959  df-so 4960  df-xp 5044  df-rel 5045  df-cnv 5046  df-co 5047  df-dm 5048  df-rn 5049  df-res 5050  df-ima 5051  df-iota 5768  df-fun 5806  df-fn 5807  df-f 5808  df-f1 5809  df-fo 5810  df-f1o 5811  df-fv 5812  df-er 7629  df-en 7842  df-dom 7843  df-sdom 7844  df-pnf 9955  df-mnf 9956  df-xr 9957  df-ltxr 9958  df-le 9959

This theorem is referenced by:  icceuelpart  39974