Theorem lhpexle1lem 35293

Description: Lemma for lhpexle1 35294 and others that eliminates restrictions on 𝑋. (Contributed by NM, 24-Jul-2013.)

Hypotheses

Ref	Expression
lhpexle1lem.1	⊢ (𝜑 → ∃𝑝 ∈ 𝐴 (𝑝 ≤ 𝑊 ∧ 𝜓))
lhpexle1lem.2	⊢ ((𝜑 ∧ (𝑋 ∈ 𝐴 ∧ 𝑋 ≤ 𝑊)) → ∃𝑝 ∈ 𝐴 (𝑝 ≤ 𝑊 ∧ 𝜓 ∧ 𝑝 ≠ 𝑋))

Assertion

Ref	Expression
lhpexle1lem	⊢ (𝜑 → ∃𝑝 ∈ 𝐴 (𝑝 ≤ 𝑊 ∧ 𝜓 ∧ 𝑝 ≠ 𝑋))

Distinct variable groups:   ≤ ,𝑝   𝐴,𝑝   𝑊,𝑝   𝑋,𝑝   𝜑,𝑝

Allowed substitution hint:   𝜓(𝑝)

Proof of Theorem lhpexle1lem

Step	Hyp	Ref	Expression
1		lhpexle1lem.1	. . . 4 ⊢ (𝜑 → ∃𝑝 ∈ 𝐴 (𝑝 ≤ 𝑊 ∧ 𝜓))
2	1	adantr 481	. . 3 ⊢ ((𝜑 ∧ ¬ 𝑋 ∈ 𝐴) → ∃𝑝 ∈ 𝐴 (𝑝 ≤ 𝑊 ∧ 𝜓))
3		simprl 794	. . . . . 6 ⊢ ((((𝜑 ∧ ¬ 𝑋 ∈ 𝐴) ∧ 𝑝 ∈ 𝐴) ∧ (𝑝 ≤ 𝑊 ∧ 𝜓)) → 𝑝 ≤ 𝑊)
4		simprr 796	. . . . . 6 ⊢ ((((𝜑 ∧ ¬ 𝑋 ∈ 𝐴) ∧ 𝑝 ∈ 𝐴) ∧ (𝑝 ≤ 𝑊 ∧ 𝜓)) → 𝜓)
5		simplr 792	. . . . . . 7 ⊢ ((((𝜑 ∧ ¬ 𝑋 ∈ 𝐴) ∧ 𝑝 ∈ 𝐴) ∧ (𝑝 ≤ 𝑊 ∧ 𝜓)) → 𝑝 ∈ 𝐴)
6		simpllr 799	. . . . . . 7 ⊢ ((((𝜑 ∧ ¬ 𝑋 ∈ 𝐴) ∧ 𝑝 ∈ 𝐴) ∧ (𝑝 ≤ 𝑊 ∧ 𝜓)) → ¬ 𝑋 ∈ 𝐴)
7		nelne2 2891	. . . . . . 7 ⊢ ((𝑝 ∈ 𝐴 ∧ ¬ 𝑋 ∈ 𝐴) → 𝑝 ≠ 𝑋)
8	5, 6, 7	syl2anc 693	. . . . . 6 ⊢ ((((𝜑 ∧ ¬ 𝑋 ∈ 𝐴) ∧ 𝑝 ∈ 𝐴) ∧ (𝑝 ≤ 𝑊 ∧ 𝜓)) → 𝑝 ≠ 𝑋)
9	3, 4, 8	3jca 1242	. . . . 5 ⊢ ((((𝜑 ∧ ¬ 𝑋 ∈ 𝐴) ∧ 𝑝 ∈ 𝐴) ∧ (𝑝 ≤ 𝑊 ∧ 𝜓)) → (𝑝 ≤ 𝑊 ∧ 𝜓 ∧ 𝑝 ≠ 𝑋))
10	9	ex 450	. . . 4 ⊢ (((𝜑 ∧ ¬ 𝑋 ∈ 𝐴) ∧ 𝑝 ∈ 𝐴) → ((𝑝 ≤ 𝑊 ∧ 𝜓) → (𝑝 ≤ 𝑊 ∧ 𝜓 ∧ 𝑝 ≠ 𝑋)))
11	10	reximdva 3017	. . 3 ⊢ ((𝜑 ∧ ¬ 𝑋 ∈ 𝐴) → (∃𝑝 ∈ 𝐴 (𝑝 ≤ 𝑊 ∧ 𝜓) → ∃𝑝 ∈ 𝐴 (𝑝 ≤ 𝑊 ∧ 𝜓 ∧ 𝑝 ≠ 𝑋)))
12	2, 11	mpd 15	. 2 ⊢ ((𝜑 ∧ ¬ 𝑋 ∈ 𝐴) → ∃𝑝 ∈ 𝐴 (𝑝 ≤ 𝑊 ∧ 𝜓 ∧ 𝑝 ≠ 𝑋))
13	1	adantr 481	. . 3 ⊢ ((𝜑 ∧ ¬ 𝑋 ≤ 𝑊) → ∃𝑝 ∈ 𝐴 (𝑝 ≤ 𝑊 ∧ 𝜓))
14		simprl 794	. . . . . 6 ⊢ (((𝜑 ∧ ¬ 𝑋 ≤ 𝑊) ∧ (𝑝 ≤ 𝑊 ∧ 𝜓)) → 𝑝 ≤ 𝑊)
15		simprr 796	. . . . . 6 ⊢ (((𝜑 ∧ ¬ 𝑋 ≤ 𝑊) ∧ (𝑝 ≤ 𝑊 ∧ 𝜓)) → 𝜓)
16		simplr 792	. . . . . . 7 ⊢ (((𝜑 ∧ ¬ 𝑋 ≤ 𝑊) ∧ (𝑝 ≤ 𝑊 ∧ 𝜓)) → ¬ 𝑋 ≤ 𝑊)
17		nbrne2 4673	. . . . . . 7 ⊢ ((𝑝 ≤ 𝑊 ∧ ¬ 𝑋 ≤ 𝑊) → 𝑝 ≠ 𝑋)
18	14, 16, 17	syl2anc 693	. . . . . 6 ⊢ (((𝜑 ∧ ¬ 𝑋 ≤ 𝑊) ∧ (𝑝 ≤ 𝑊 ∧ 𝜓)) → 𝑝 ≠ 𝑋)
19	14, 15, 18	3jca 1242	. . . . 5 ⊢ (((𝜑 ∧ ¬ 𝑋 ≤ 𝑊) ∧ (𝑝 ≤ 𝑊 ∧ 𝜓)) → (𝑝 ≤ 𝑊 ∧ 𝜓 ∧ 𝑝 ≠ 𝑋))
20	19	ex 450	. . . 4 ⊢ ((𝜑 ∧ ¬ 𝑋 ≤ 𝑊) → ((𝑝 ≤ 𝑊 ∧ 𝜓) → (𝑝 ≤ 𝑊 ∧ 𝜓 ∧ 𝑝 ≠ 𝑋)))
21	20	reximdv 3016	. . 3 ⊢ ((𝜑 ∧ ¬ 𝑋 ≤ 𝑊) → (∃𝑝 ∈ 𝐴 (𝑝 ≤ 𝑊 ∧ 𝜓) → ∃𝑝 ∈ 𝐴 (𝑝 ≤ 𝑊 ∧ 𝜓 ∧ 𝑝 ≠ 𝑋)))
22	13, 21	mpd 15	. 2 ⊢ ((𝜑 ∧ ¬ 𝑋 ≤ 𝑊) → ∃𝑝 ∈ 𝐴 (𝑝 ≤ 𝑊 ∧ 𝜓 ∧ 𝑝 ≠ 𝑋))
23		lhpexle1lem.2	. 2 ⊢ ((𝜑 ∧ (𝑋 ∈ 𝐴 ∧ 𝑋 ≤ 𝑊)) → ∃𝑝 ∈ 𝐴 (𝑝 ≤ 𝑊 ∧ 𝜓 ∧ 𝑝 ≠ 𝑋))
24	12, 22, 23	pm2.61dda 834	1 ⊢ (𝜑 → ∃𝑝 ∈ 𝐴 (𝑝 ≤ 𝑊 ∧ 𝜓 ∧ 𝑝 ≠ 𝑋))

Syntax hints:  ¬ wn 3   → wi 4   ∧ wa 384   ∧ w3a 1037   ∈ wcel 1990   ≠ wne 2794  ∃wrex 2913   class class class wbr 4653

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-ral 2917  df-rex 2918  df-rab 2921  df-v 3202  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-nul 3916  df-if 4087  df-sn 4178  df-pr 4180  df-op 4184  df-br 4654

This theorem is referenced by:  lhpexle1  35294  lhpexle2  35296  lhpexle3  35298