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Theorem axpre-sup 10178
Description: A nonempty, bounded-above set of reals has a supremum. Axiom 22 of 22 for real and complex numbers, derived from ZF set theory. Note: The more general version with ordering on extended reals is axsup 10301. This construction-dependent theorem should not be referenced directly; instead, use ax-pre-sup 10202. (Contributed by NM, 19-May-1996.) (Revised by Mario Carneiro, 16-Jun-2013.) (New usage is discouraged.)
Assertion
Ref Expression
axpre-sup ((𝐴 ⊆ ℝ ∧ 𝐴 ≠ ∅ ∧ ∃𝑥 ∈ ℝ ∀𝑦𝐴 𝑦 < 𝑥) → ∃𝑥 ∈ ℝ (∀𝑦𝐴 ¬ 𝑥 < 𝑦 ∧ ∀𝑦 ∈ ℝ (𝑦 < 𝑥 → ∃𝑧𝐴 𝑦 < 𝑧)))
Distinct variable group:   𝑥,𝑦,𝑧,𝐴

Proof of Theorem axpre-sup
Dummy variables 𝑤 𝑣 𝑢 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 elreal2 10141 . . . . . . 7 (𝑥 ∈ ℝ ↔ ((1st𝑥) ∈ R𝑥 = ⟨(1st𝑥), 0R⟩))
21simplbi 478 . . . . . 6 (𝑥 ∈ ℝ → (1st𝑥) ∈ R)
32adantl 473 . . . . 5 (((𝐴 ⊆ ℝ ∧ 𝐴 ≠ ∅) ∧ 𝑥 ∈ ℝ) → (1st𝑥) ∈ R)
4 fo1st 7349 . . . . . . . . . . . 12 1st :V–onto→V
5 fof 6272 . . . . . . . . . . . 12 (1st :V–onto→V → 1st :V⟶V)
6 ffn 6202 . . . . . . . . . . . 12 (1st :V⟶V → 1st Fn V)
74, 5, 6mp2b 10 . . . . . . . . . . 11 1st Fn V
8 ssv 3762 . . . . . . . . . . 11 𝐴 ⊆ V
9 fvelimab 6411 . . . . . . . . . . 11 ((1st Fn V ∧ 𝐴 ⊆ V) → (𝑤 ∈ (1st𝐴) ↔ ∃𝑦𝐴 (1st𝑦) = 𝑤))
107, 8, 9mp2an 710 . . . . . . . . . 10 (𝑤 ∈ (1st𝐴) ↔ ∃𝑦𝐴 (1st𝑦) = 𝑤)
11 r19.29 3206 . . . . . . . . . . . 12 ((∀𝑦𝐴 𝑦 < 𝑥 ∧ ∃𝑦𝐴 (1st𝑦) = 𝑤) → ∃𝑦𝐴 (𝑦 < 𝑥 ∧ (1st𝑦) = 𝑤))
12 ssel2 3735 . . . . . . . . . . . . . . . . 17 ((𝐴 ⊆ ℝ ∧ 𝑦𝐴) → 𝑦 ∈ ℝ)
13 ltresr2 10150 . . . . . . . . . . . . . . . . . . . 20 ((𝑦 ∈ ℝ ∧ 𝑥 ∈ ℝ) → (𝑦 < 𝑥 ↔ (1st𝑦) <R (1st𝑥)))
14 breq1 4803 . . . . . . . . . . . . . . . . . . . 20 ((1st𝑦) = 𝑤 → ((1st𝑦) <R (1st𝑥) ↔ 𝑤 <R (1st𝑥)))
1513, 14sylan9bb 738 . . . . . . . . . . . . . . . . . . 19 (((𝑦 ∈ ℝ ∧ 𝑥 ∈ ℝ) ∧ (1st𝑦) = 𝑤) → (𝑦 < 𝑥𝑤 <R (1st𝑥)))
1615biimpd 219 . . . . . . . . . . . . . . . . . 18 (((𝑦 ∈ ℝ ∧ 𝑥 ∈ ℝ) ∧ (1st𝑦) = 𝑤) → (𝑦 < 𝑥𝑤 <R (1st𝑥)))
1716exp31 631 . . . . . . . . . . . . . . . . 17 (𝑦 ∈ ℝ → (𝑥 ∈ ℝ → ((1st𝑦) = 𝑤 → (𝑦 < 𝑥𝑤 <R (1st𝑥)))))
1812, 17syl 17 . . . . . . . . . . . . . . . 16 ((𝐴 ⊆ ℝ ∧ 𝑦𝐴) → (𝑥 ∈ ℝ → ((1st𝑦) = 𝑤 → (𝑦 < 𝑥𝑤 <R (1st𝑥)))))
1918imp4b 614 . . . . . . . . . . . . . . 15 (((𝐴 ⊆ ℝ ∧ 𝑦𝐴) ∧ 𝑥 ∈ ℝ) → (((1st𝑦) = 𝑤𝑦 < 𝑥) → 𝑤 <R (1st𝑥)))
2019ancomsd 469 . . . . . . . . . . . . . 14 (((𝐴 ⊆ ℝ ∧ 𝑦𝐴) ∧ 𝑥 ∈ ℝ) → ((𝑦 < 𝑥 ∧ (1st𝑦) = 𝑤) → 𝑤 <R (1st𝑥)))
2120an32s 881 . . . . . . . . . . . . 13 (((𝐴 ⊆ ℝ ∧ 𝑥 ∈ ℝ) ∧ 𝑦𝐴) → ((𝑦 < 𝑥 ∧ (1st𝑦) = 𝑤) → 𝑤 <R (1st𝑥)))
2221rexlimdva 3165 . . . . . . . . . . . 12 ((𝐴 ⊆ ℝ ∧ 𝑥 ∈ ℝ) → (∃𝑦𝐴 (𝑦 < 𝑥 ∧ (1st𝑦) = 𝑤) → 𝑤 <R (1st𝑥)))
2311, 22syl5 34 . . . . . . . . . . 11 ((𝐴 ⊆ ℝ ∧ 𝑥 ∈ ℝ) → ((∀𝑦𝐴 𝑦 < 𝑥 ∧ ∃𝑦𝐴 (1st𝑦) = 𝑤) → 𝑤 <R (1st𝑥)))
2423expd 451 . . . . . . . . . 10 ((𝐴 ⊆ ℝ ∧ 𝑥 ∈ ℝ) → (∀𝑦𝐴 𝑦 < 𝑥 → (∃𝑦𝐴 (1st𝑦) = 𝑤𝑤 <R (1st𝑥))))
2510, 24syl7bi 245 . . . . . . . . 9 ((𝐴 ⊆ ℝ ∧ 𝑥 ∈ ℝ) → (∀𝑦𝐴 𝑦 < 𝑥 → (𝑤 ∈ (1st𝐴) → 𝑤 <R (1st𝑥))))
2625impr 650 . . . . . . . 8 ((𝐴 ⊆ ℝ ∧ (𝑥 ∈ ℝ ∧ ∀𝑦𝐴 𝑦 < 𝑥)) → (𝑤 ∈ (1st𝐴) → 𝑤 <R (1st𝑥)))
2726adantlr 753 . . . . . . 7 (((𝐴 ⊆ ℝ ∧ 𝐴 ≠ ∅) ∧ (𝑥 ∈ ℝ ∧ ∀𝑦𝐴 𝑦 < 𝑥)) → (𝑤 ∈ (1st𝐴) → 𝑤 <R (1st𝑥)))
2827ralrimiv 3099 . . . . . 6 (((𝐴 ⊆ ℝ ∧ 𝐴 ≠ ∅) ∧ (𝑥 ∈ ℝ ∧ ∀𝑦𝐴 𝑦 < 𝑥)) → ∀𝑤 ∈ (1st𝐴)𝑤 <R (1st𝑥))
2928expr 644 . . . . 5 (((𝐴 ⊆ ℝ ∧ 𝐴 ≠ ∅) ∧ 𝑥 ∈ ℝ) → (∀𝑦𝐴 𝑦 < 𝑥 → ∀𝑤 ∈ (1st𝐴)𝑤 <R (1st𝑥)))
30 breq2 4804 . . . . . . 7 (𝑣 = (1st𝑥) → (𝑤 <R 𝑣𝑤 <R (1st𝑥)))
3130ralbidv 3120 . . . . . 6 (𝑣 = (1st𝑥) → (∀𝑤 ∈ (1st𝐴)𝑤 <R 𝑣 ↔ ∀𝑤 ∈ (1st𝐴)𝑤 <R (1st𝑥)))
3231rspcev 3445 . . . . 5 (((1st𝑥) ∈ R ∧ ∀𝑤 ∈ (1st𝐴)𝑤 <R (1st𝑥)) → ∃𝑣R𝑤 ∈ (1st𝐴)𝑤 <R 𝑣)
333, 29, 32syl6an 569 . . . 4 (((𝐴 ⊆ ℝ ∧ 𝐴 ≠ ∅) ∧ 𝑥 ∈ ℝ) → (∀𝑦𝐴 𝑦 < 𝑥 → ∃𝑣R𝑤 ∈ (1st𝐴)𝑤 <R 𝑣))
3433rexlimdva 3165 . . 3 ((𝐴 ⊆ ℝ ∧ 𝐴 ≠ ∅) → (∃𝑥 ∈ ℝ ∀𝑦𝐴 𝑦 < 𝑥 → ∃𝑣R𝑤 ∈ (1st𝐴)𝑤 <R 𝑣))
35 n0 4070 . . . . . 6 (𝐴 ≠ ∅ ↔ ∃𝑦 𝑦𝐴)
36 fnfvima 6655 . . . . . . . . 9 ((1st Fn V ∧ 𝐴 ⊆ V ∧ 𝑦𝐴) → (1st𝑦) ∈ (1st𝐴))
377, 8, 36mp3an12 1559 . . . . . . . 8 (𝑦𝐴 → (1st𝑦) ∈ (1st𝐴))
38 ne0i 4060 . . . . . . . 8 ((1st𝑦) ∈ (1st𝐴) → (1st𝐴) ≠ ∅)
3937, 38syl 17 . . . . . . 7 (𝑦𝐴 → (1st𝐴) ≠ ∅)
4039exlimiv 2003 . . . . . 6 (∃𝑦 𝑦𝐴 → (1st𝐴) ≠ ∅)
4135, 40sylbi 207 . . . . 5 (𝐴 ≠ ∅ → (1st𝐴) ≠ ∅)
42 supsr 10121 . . . . . 6 (((1st𝐴) ≠ ∅ ∧ ∃𝑣R𝑤 ∈ (1st𝐴)𝑤 <R 𝑣) → ∃𝑣R (∀𝑤 ∈ (1st𝐴) ¬ 𝑣 <R 𝑤 ∧ ∀𝑤R (𝑤 <R 𝑣 → ∃𝑢 ∈ (1st𝐴)𝑤 <R 𝑢)))
4342ex 449 . . . . 5 ((1st𝐴) ≠ ∅ → (∃𝑣R𝑤 ∈ (1st𝐴)𝑤 <R 𝑣 → ∃𝑣R (∀𝑤 ∈ (1st𝐴) ¬ 𝑣 <R 𝑤 ∧ ∀𝑤R (𝑤 <R 𝑣 → ∃𝑢 ∈ (1st𝐴)𝑤 <R 𝑢))))
4441, 43syl 17 . . . 4 (𝐴 ≠ ∅ → (∃𝑣R𝑤 ∈ (1st𝐴)𝑤 <R 𝑣 → ∃𝑣R (∀𝑤 ∈ (1st𝐴) ¬ 𝑣 <R 𝑤 ∧ ∀𝑤R (𝑤 <R 𝑣 → ∃𝑢 ∈ (1st𝐴)𝑤 <R 𝑢))))
4544adantl 473 . . 3 ((𝐴 ⊆ ℝ ∧ 𝐴 ≠ ∅) → (∃𝑣R𝑤 ∈ (1st𝐴)𝑤 <R 𝑣 → ∃𝑣R (∀𝑤 ∈ (1st𝐴) ¬ 𝑣 <R 𝑤 ∧ ∀𝑤R (𝑤 <R 𝑣 → ∃𝑢 ∈ (1st𝐴)𝑤 <R 𝑢))))
46 breq2 4804 . . . . . . . . . . . 12 (𝑤 = (1st𝑦) → (𝑣 <R 𝑤𝑣 <R (1st𝑦)))
4746notbid 307 . . . . . . . . . . 11 (𝑤 = (1st𝑦) → (¬ 𝑣 <R 𝑤 ↔ ¬ 𝑣 <R (1st𝑦)))
4847rspccv 3442 . . . . . . . . . 10 (∀𝑤 ∈ (1st𝐴) ¬ 𝑣 <R 𝑤 → ((1st𝑦) ∈ (1st𝐴) → ¬ 𝑣 <R (1st𝑦)))
4937, 48syl5com 31 . . . . . . . . 9 (𝑦𝐴 → (∀𝑤 ∈ (1st𝐴) ¬ 𝑣 <R 𝑤 → ¬ 𝑣 <R (1st𝑦)))
5049adantl 473 . . . . . . . 8 ((𝐴 ⊆ ℝ ∧ 𝑦𝐴) → (∀𝑤 ∈ (1st𝐴) ¬ 𝑣 <R 𝑤 → ¬ 𝑣 <R (1st𝑦)))
51 elreal2 10141 . . . . . . . . . . . . 13 (𝑦 ∈ ℝ ↔ ((1st𝑦) ∈ R𝑦 = ⟨(1st𝑦), 0R⟩))
5251simprbi 483 . . . . . . . . . . . 12 (𝑦 ∈ ℝ → 𝑦 = ⟨(1st𝑦), 0R⟩)
5352breq2d 4812 . . . . . . . . . . 11 (𝑦 ∈ ℝ → (⟨𝑣, 0R⟩ < 𝑦 ↔ ⟨𝑣, 0R⟩ < ⟨(1st𝑦), 0R⟩))
54 ltresr 10149 . . . . . . . . . . 11 (⟨𝑣, 0R⟩ < ⟨(1st𝑦), 0R⟩ ↔ 𝑣 <R (1st𝑦))
5553, 54syl6bb 276 . . . . . . . . . 10 (𝑦 ∈ ℝ → (⟨𝑣, 0R⟩ < 𝑦𝑣 <R (1st𝑦)))
5612, 55syl 17 . . . . . . . . 9 ((𝐴 ⊆ ℝ ∧ 𝑦𝐴) → (⟨𝑣, 0R⟩ < 𝑦𝑣 <R (1st𝑦)))
5756notbid 307 . . . . . . . 8 ((𝐴 ⊆ ℝ ∧ 𝑦𝐴) → (¬ ⟨𝑣, 0R⟩ < 𝑦 ↔ ¬ 𝑣 <R (1st𝑦)))
5850, 57sylibrd 249 . . . . . . 7 ((𝐴 ⊆ ℝ ∧ 𝑦𝐴) → (∀𝑤 ∈ (1st𝐴) ¬ 𝑣 <R 𝑤 → ¬ ⟨𝑣, 0R⟩ < 𝑦))
5958ralrimdva 3103 . . . . . 6 (𝐴 ⊆ ℝ → (∀𝑤 ∈ (1st𝐴) ¬ 𝑣 <R 𝑤 → ∀𝑦𝐴 ¬ ⟨𝑣, 0R⟩ < 𝑦))
6059ad2antrr 764 . . . . 5 (((𝐴 ⊆ ℝ ∧ 𝐴 ≠ ∅) ∧ 𝑣R) → (∀𝑤 ∈ (1st𝐴) ¬ 𝑣 <R 𝑤 → ∀𝑦𝐴 ¬ ⟨𝑣, 0R⟩ < 𝑦))
6152breq1d 4810 . . . . . . . . . . . . . 14 (𝑦 ∈ ℝ → (𝑦 <𝑣, 0R⟩ ↔ ⟨(1st𝑦), 0R⟩ <𝑣, 0R⟩))
62 ltresr 10149 . . . . . . . . . . . . . 14 (⟨(1st𝑦), 0R⟩ <𝑣, 0R⟩ ↔ (1st𝑦) <R 𝑣)
6361, 62syl6bb 276 . . . . . . . . . . . . 13 (𝑦 ∈ ℝ → (𝑦 <𝑣, 0R⟩ ↔ (1st𝑦) <R 𝑣))
6451simplbi 478 . . . . . . . . . . . . . . 15 (𝑦 ∈ ℝ → (1st𝑦) ∈ R)
65 breq1 4803 . . . . . . . . . . . . . . . . 17 (𝑤 = (1st𝑦) → (𝑤 <R 𝑣 ↔ (1st𝑦) <R 𝑣))
66 breq1 4803 . . . . . . . . . . . . . . . . . 18 (𝑤 = (1st𝑦) → (𝑤 <R 𝑢 ↔ (1st𝑦) <R 𝑢))
6766rexbidv 3186 . . . . . . . . . . . . . . . . 17 (𝑤 = (1st𝑦) → (∃𝑢 ∈ (1st𝐴)𝑤 <R 𝑢 ↔ ∃𝑢 ∈ (1st𝐴)(1st𝑦) <R 𝑢))
6865, 67imbi12d 333 . . . . . . . . . . . . . . . 16 (𝑤 = (1st𝑦) → ((𝑤 <R 𝑣 → ∃𝑢 ∈ (1st𝐴)𝑤 <R 𝑢) ↔ ((1st𝑦) <R 𝑣 → ∃𝑢 ∈ (1st𝐴)(1st𝑦) <R 𝑢)))
6968rspccv 3442 . . . . . . . . . . . . . . 15 (∀𝑤R (𝑤 <R 𝑣 → ∃𝑢 ∈ (1st𝐴)𝑤 <R 𝑢) → ((1st𝑦) ∈ R → ((1st𝑦) <R 𝑣 → ∃𝑢 ∈ (1st𝐴)(1st𝑦) <R 𝑢)))
7064, 69syl5 34 . . . . . . . . . . . . . 14 (∀𝑤R (𝑤 <R 𝑣 → ∃𝑢 ∈ (1st𝐴)𝑤 <R 𝑢) → (𝑦 ∈ ℝ → ((1st𝑦) <R 𝑣 → ∃𝑢 ∈ (1st𝐴)(1st𝑦) <R 𝑢)))
7170com3l 89 . . . . . . . . . . . . 13 (𝑦 ∈ ℝ → ((1st𝑦) <R 𝑣 → (∀𝑤R (𝑤 <R 𝑣 → ∃𝑢 ∈ (1st𝐴)𝑤 <R 𝑢) → ∃𝑢 ∈ (1st𝐴)(1st𝑦) <R 𝑢)))
7263, 71sylbid 230 . . . . . . . . . . . 12 (𝑦 ∈ ℝ → (𝑦 <𝑣, 0R⟩ → (∀𝑤R (𝑤 <R 𝑣 → ∃𝑢 ∈ (1st𝐴)𝑤 <R 𝑢) → ∃𝑢 ∈ (1st𝐴)(1st𝑦) <R 𝑢)))
7372adantr 472 . . . . . . . . . . 11 ((𝑦 ∈ ℝ ∧ 𝐴 ⊆ ℝ) → (𝑦 <𝑣, 0R⟩ → (∀𝑤R (𝑤 <R 𝑣 → ∃𝑢 ∈ (1st𝐴)𝑤 <R 𝑢) → ∃𝑢 ∈ (1st𝐴)(1st𝑦) <R 𝑢)))
74 fvelimab 6411 . . . . . . . . . . . . . . . 16 ((1st Fn V ∧ 𝐴 ⊆ V) → (𝑢 ∈ (1st𝐴) ↔ ∃𝑧𝐴 (1st𝑧) = 𝑢))
757, 8, 74mp2an 710 . . . . . . . . . . . . . . 15 (𝑢 ∈ (1st𝐴) ↔ ∃𝑧𝐴 (1st𝑧) = 𝑢)
76 ssel2 3735 . . . . . . . . . . . . . . . . . . . . . 22 ((𝐴 ⊆ ℝ ∧ 𝑧𝐴) → 𝑧 ∈ ℝ)
77 ltresr2 10150 . . . . . . . . . . . . . . . . . . . . . 22 ((𝑦 ∈ ℝ ∧ 𝑧 ∈ ℝ) → (𝑦 < 𝑧 ↔ (1st𝑦) <R (1st𝑧)))
7876, 77sylan2 492 . . . . . . . . . . . . . . . . . . . . 21 ((𝑦 ∈ ℝ ∧ (𝐴 ⊆ ℝ ∧ 𝑧𝐴)) → (𝑦 < 𝑧 ↔ (1st𝑦) <R (1st𝑧)))
79 breq2 4804 . . . . . . . . . . . . . . . . . . . . 21 ((1st𝑧) = 𝑢 → ((1st𝑦) <R (1st𝑧) ↔ (1st𝑦) <R 𝑢))
8078, 79sylan9bb 738 . . . . . . . . . . . . . . . . . . . 20 (((𝑦 ∈ ℝ ∧ (𝐴 ⊆ ℝ ∧ 𝑧𝐴)) ∧ (1st𝑧) = 𝑢) → (𝑦 < 𝑧 ↔ (1st𝑦) <R 𝑢))
8180exbiri 653 . . . . . . . . . . . . . . . . . . 19 ((𝑦 ∈ ℝ ∧ (𝐴 ⊆ ℝ ∧ 𝑧𝐴)) → ((1st𝑧) = 𝑢 → ((1st𝑦) <R 𝑢𝑦 < 𝑧)))
8281expr 644 . . . . . . . . . . . . . . . . . 18 ((𝑦 ∈ ℝ ∧ 𝐴 ⊆ ℝ) → (𝑧𝐴 → ((1st𝑧) = 𝑢 → ((1st𝑦) <R 𝑢𝑦 < 𝑧))))
8382com4r 94 . . . . . . . . . . . . . . . . 17 ((1st𝑦) <R 𝑢 → ((𝑦 ∈ ℝ ∧ 𝐴 ⊆ ℝ) → (𝑧𝐴 → ((1st𝑧) = 𝑢𝑦 < 𝑧))))
8483imp 444 . . . . . . . . . . . . . . . 16 (((1st𝑦) <R 𝑢 ∧ (𝑦 ∈ ℝ ∧ 𝐴 ⊆ ℝ)) → (𝑧𝐴 → ((1st𝑧) = 𝑢𝑦 < 𝑧)))
8584reximdvai 3149 . . . . . . . . . . . . . . 15 (((1st𝑦) <R 𝑢 ∧ (𝑦 ∈ ℝ ∧ 𝐴 ⊆ ℝ)) → (∃𝑧𝐴 (1st𝑧) = 𝑢 → ∃𝑧𝐴 𝑦 < 𝑧))
8675, 85syl5bi 232 . . . . . . . . . . . . . 14 (((1st𝑦) <R 𝑢 ∧ (𝑦 ∈ ℝ ∧ 𝐴 ⊆ ℝ)) → (𝑢 ∈ (1st𝐴) → ∃𝑧𝐴 𝑦 < 𝑧))
8786expcom 450 . . . . . . . . . . . . 13 ((𝑦 ∈ ℝ ∧ 𝐴 ⊆ ℝ) → ((1st𝑦) <R 𝑢 → (𝑢 ∈ (1st𝐴) → ∃𝑧𝐴 𝑦 < 𝑧)))
8887com23 86 . . . . . . . . . . . 12 ((𝑦 ∈ ℝ ∧ 𝐴 ⊆ ℝ) → (𝑢 ∈ (1st𝐴) → ((1st𝑦) <R 𝑢 → ∃𝑧𝐴 𝑦 < 𝑧)))
8988rexlimdv 3164 . . . . . . . . . . 11 ((𝑦 ∈ ℝ ∧ 𝐴 ⊆ ℝ) → (∃𝑢 ∈ (1st𝐴)(1st𝑦) <R 𝑢 → ∃𝑧𝐴 𝑦 < 𝑧))
9073, 89syl6d 75 . . . . . . . . . 10 ((𝑦 ∈ ℝ ∧ 𝐴 ⊆ ℝ) → (𝑦 <𝑣, 0R⟩ → (∀𝑤R (𝑤 <R 𝑣 → ∃𝑢 ∈ (1st𝐴)𝑤 <R 𝑢) → ∃𝑧𝐴 𝑦 < 𝑧)))
9190com23 86 . . . . . . . . 9 ((𝑦 ∈ ℝ ∧ 𝐴 ⊆ ℝ) → (∀𝑤R (𝑤 <R 𝑣 → ∃𝑢 ∈ (1st𝐴)𝑤 <R 𝑢) → (𝑦 <𝑣, 0R⟩ → ∃𝑧𝐴 𝑦 < 𝑧)))
9291ex 449 . . . . . . . 8 (𝑦 ∈ ℝ → (𝐴 ⊆ ℝ → (∀𝑤R (𝑤 <R 𝑣 → ∃𝑢 ∈ (1st𝐴)𝑤 <R 𝑢) → (𝑦 <𝑣, 0R⟩ → ∃𝑧𝐴 𝑦 < 𝑧))))
9392com3l 89 . . . . . . 7 (𝐴 ⊆ ℝ → (∀𝑤R (𝑤 <R 𝑣 → ∃𝑢 ∈ (1st𝐴)𝑤 <R 𝑢) → (𝑦 ∈ ℝ → (𝑦 <𝑣, 0R⟩ → ∃𝑧𝐴 𝑦 < 𝑧))))
9493ad2antrr 764 . . . . . 6 (((𝐴 ⊆ ℝ ∧ 𝐴 ≠ ∅) ∧ 𝑣R) → (∀𝑤R (𝑤 <R 𝑣 → ∃𝑢 ∈ (1st𝐴)𝑤 <R 𝑢) → (𝑦 ∈ ℝ → (𝑦 <𝑣, 0R⟩ → ∃𝑧𝐴 𝑦 < 𝑧))))
9594ralrimdv 3102 . . . . 5 (((𝐴 ⊆ ℝ ∧ 𝐴 ≠ ∅) ∧ 𝑣R) → (∀𝑤R (𝑤 <R 𝑣 → ∃𝑢 ∈ (1st𝐴)𝑤 <R 𝑢) → ∀𝑦 ∈ ℝ (𝑦 <𝑣, 0R⟩ → ∃𝑧𝐴 𝑦 < 𝑧)))
96 opelreal 10139 . . . . . . . 8 (⟨𝑣, 0R⟩ ∈ ℝ ↔ 𝑣R)
9796biimpri 218 . . . . . . 7 (𝑣R → ⟨𝑣, 0R⟩ ∈ ℝ)
9897adantl 473 . . . . . 6 (((𝐴 ⊆ ℝ ∧ 𝐴 ≠ ∅) ∧ 𝑣R) → ⟨𝑣, 0R⟩ ∈ ℝ)
99 breq1 4803 . . . . . . . . . . 11 (𝑥 = ⟨𝑣, 0R⟩ → (𝑥 < 𝑦 ↔ ⟨𝑣, 0R⟩ < 𝑦))
10099notbid 307 . . . . . . . . . 10 (𝑥 = ⟨𝑣, 0R⟩ → (¬ 𝑥 < 𝑦 ↔ ¬ ⟨𝑣, 0R⟩ < 𝑦))
101100ralbidv 3120 . . . . . . . . 9 (𝑥 = ⟨𝑣, 0R⟩ → (∀𝑦𝐴 ¬ 𝑥 < 𝑦 ↔ ∀𝑦𝐴 ¬ ⟨𝑣, 0R⟩ < 𝑦))
102 breq2 4804 . . . . . . . . . . 11 (𝑥 = ⟨𝑣, 0R⟩ → (𝑦 < 𝑥𝑦 <𝑣, 0R⟩))
103102imbi1d 330 . . . . . . . . . 10 (𝑥 = ⟨𝑣, 0R⟩ → ((𝑦 < 𝑥 → ∃𝑧𝐴 𝑦 < 𝑧) ↔ (𝑦 <𝑣, 0R⟩ → ∃𝑧𝐴 𝑦 < 𝑧)))
104103ralbidv 3120 . . . . . . . . 9 (𝑥 = ⟨𝑣, 0R⟩ → (∀𝑦 ∈ ℝ (𝑦 < 𝑥 → ∃𝑧𝐴 𝑦 < 𝑧) ↔ ∀𝑦 ∈ ℝ (𝑦 <𝑣, 0R⟩ → ∃𝑧𝐴 𝑦 < 𝑧)))
105101, 104anbi12d 749 . . . . . . . 8 (𝑥 = ⟨𝑣, 0R⟩ → ((∀𝑦𝐴 ¬ 𝑥 < 𝑦 ∧ ∀𝑦 ∈ ℝ (𝑦 < 𝑥 → ∃𝑧𝐴 𝑦 < 𝑧)) ↔ (∀𝑦𝐴 ¬ ⟨𝑣, 0R⟩ < 𝑦 ∧ ∀𝑦 ∈ ℝ (𝑦 <𝑣, 0R⟩ → ∃𝑧𝐴 𝑦 < 𝑧))))
106105rspcev 3445 . . . . . . 7 ((⟨𝑣, 0R⟩ ∈ ℝ ∧ (∀𝑦𝐴 ¬ ⟨𝑣, 0R⟩ < 𝑦 ∧ ∀𝑦 ∈ ℝ (𝑦 <𝑣, 0R⟩ → ∃𝑧𝐴 𝑦 < 𝑧))) → ∃𝑥 ∈ ℝ (∀𝑦𝐴 ¬ 𝑥 < 𝑦 ∧ ∀𝑦 ∈ ℝ (𝑦 < 𝑥 → ∃𝑧𝐴 𝑦 < 𝑧)))
107106ex 449 . . . . . 6 (⟨𝑣, 0R⟩ ∈ ℝ → ((∀𝑦𝐴 ¬ ⟨𝑣, 0R⟩ < 𝑦 ∧ ∀𝑦 ∈ ℝ (𝑦 <𝑣, 0R⟩ → ∃𝑧𝐴 𝑦 < 𝑧)) → ∃𝑥 ∈ ℝ (∀𝑦𝐴 ¬ 𝑥 < 𝑦 ∧ ∀𝑦 ∈ ℝ (𝑦 < 𝑥 → ∃𝑧𝐴 𝑦 < 𝑧))))
10898, 107syl 17 . . . . 5 (((𝐴 ⊆ ℝ ∧ 𝐴 ≠ ∅) ∧ 𝑣R) → ((∀𝑦𝐴 ¬ ⟨𝑣, 0R⟩ < 𝑦 ∧ ∀𝑦 ∈ ℝ (𝑦 <𝑣, 0R⟩ → ∃𝑧𝐴 𝑦 < 𝑧)) → ∃𝑥 ∈ ℝ (∀𝑦𝐴 ¬ 𝑥 < 𝑦 ∧ ∀𝑦 ∈ ℝ (𝑦 < 𝑥 → ∃𝑧𝐴 𝑦 < 𝑧))))
10960, 95, 108syl2and 501 . . . 4 (((𝐴 ⊆ ℝ ∧ 𝐴 ≠ ∅) ∧ 𝑣R) → ((∀𝑤 ∈ (1st𝐴) ¬ 𝑣 <R 𝑤 ∧ ∀𝑤R (𝑤 <R 𝑣 → ∃𝑢 ∈ (1st𝐴)𝑤 <R 𝑢)) → ∃𝑥 ∈ ℝ (∀𝑦𝐴 ¬ 𝑥 < 𝑦 ∧ ∀𝑦 ∈ ℝ (𝑦 < 𝑥 → ∃𝑧𝐴 𝑦 < 𝑧))))
110109rexlimdva 3165 . . 3 ((𝐴 ⊆ ℝ ∧ 𝐴 ≠ ∅) → (∃𝑣R (∀𝑤 ∈ (1st𝐴) ¬ 𝑣 <R 𝑤 ∧ ∀𝑤R (𝑤 <R 𝑣 → ∃𝑢 ∈ (1st𝐴)𝑤 <R 𝑢)) → ∃𝑥 ∈ ℝ (∀𝑦𝐴 ¬ 𝑥 < 𝑦 ∧ ∀𝑦 ∈ ℝ (𝑦 < 𝑥 → ∃𝑧𝐴 𝑦 < 𝑧))))
11134, 45, 1103syld 60 . 2 ((𝐴 ⊆ ℝ ∧ 𝐴 ≠ ∅) → (∃𝑥 ∈ ℝ ∀𝑦𝐴 𝑦 < 𝑥 → ∃𝑥 ∈ ℝ (∀𝑦𝐴 ¬ 𝑥 < 𝑦 ∧ ∀𝑦 ∈ ℝ (𝑦 < 𝑥 → ∃𝑧𝐴 𝑦 < 𝑧))))
1121113impia 1110 1 ((𝐴 ⊆ ℝ ∧ 𝐴 ≠ ∅ ∧ ∃𝑥 ∈ ℝ ∀𝑦𝐴 𝑦 < 𝑥) → ∃𝑥 ∈ ℝ (∀𝑦𝐴 ¬ 𝑥 < 𝑦 ∧ ∀𝑦 ∈ ℝ (𝑦 < 𝑥 → ∃𝑧𝐴 𝑦 < 𝑧)))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wb 196  wa 383  w3a 1072   = wceq 1628  wex 1849  wcel 2135  wne 2928  wral 3046  wrex 3047  Vcvv 3336  wss 3711  c0 4054  cop 4323   class class class wbr 4800  cima 5265   Fn wfn 6040  wf 6041  ontowfo 6043  cfv 6045  1st c1st 7327  Rcnr 9875  0Rc0r 9876   <R cltr 9881  cr 10123   < cltrr 10128
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1867  ax-4 1882  ax-5 1984  ax-6 2050  ax-7 2086  ax-8 2137  ax-9 2144  ax-10 2164  ax-11 2179  ax-12 2192  ax-13 2387  ax-ext 2736  ax-sep 4929  ax-nul 4937  ax-pow 4988  ax-pr 5051  ax-un 7110  ax-inf2 8707
This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3or 1073  df-3an 1074  df-tru 1631  df-ex 1850  df-nf 1855  df-sb 2043  df-eu 2607  df-mo 2608  df-clab 2743  df-cleq 2749  df-clel 2752  df-nfc 2887  df-ne 2929  df-ral 3051  df-rex 3052  df-reu 3053  df-rmo 3054  df-rab 3055  df-v 3338  df-sbc 3573  df-csb 3671  df-dif 3714  df-un 3716  df-in 3718  df-ss 3725  df-pss 3727  df-nul 4055  df-if 4227  df-pw 4300  df-sn 4318  df-pr 4320  df-tp 4322  df-op 4324  df-uni 4585  df-int 4624  df-iun 4670  df-br 4801  df-opab 4861  df-mpt 4878  df-tr 4901  df-id 5170  df-eprel 5175  df-po 5183  df-so 5184  df-fr 5221  df-we 5223  df-xp 5268  df-rel 5269  df-cnv 5270  df-co 5271  df-dm 5272  df-rn 5273  df-res 5274  df-ima 5275  df-pred 5837  df-ord 5883  df-on 5884  df-lim 5885  df-suc 5886  df-iota 6008  df-fun 6047  df-fn 6048  df-f 6049  df-f1 6050  df-fo 6051  df-f1o 6052  df-fv 6053  df-ov 6812  df-oprab 6813  df-mpt2 6814  df-om 7227  df-1st 7329  df-2nd 7330  df-wrecs 7572  df-recs 7633  df-rdg 7671  df-1o 7725  df-oadd 7729  df-omul 7730  df-er 7907  df-ec 7909  df-qs 7913  df-ni 9882  df-pli 9883  df-mi 9884  df-lti 9885  df-plpq 9918  df-mpq 9919  df-ltpq 9920  df-enq 9921  df-nq 9922  df-erq 9923  df-plq 9924  df-mq 9925  df-1nq 9926  df-rq 9927  df-ltnq 9928  df-np 9991  df-1p 9992  df-plp 9993  df-mp 9994  df-ltp 9995  df-enr 10065  df-nr 10066  df-plr 10067  df-mr 10068  df-ltr 10069  df-0r 10070  df-1r 10071  df-m1r 10072  df-r 10134  df-lt 10137
This theorem is referenced by: (None)
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