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Theorem pellfundex 40708
Description: The fundamental solution as an infimum is itself a solution, showing that the solution set is discrete.

Since the fundamental solution is an infimum, there must be an element ge to Fund and lt 2*Fund. If this element is equal to the fundamental solution we're done, otherwise use the infimum again to find another element which must be ge Fund and lt the first element; their ratio is a group element in (1,2), contradicting pell14qrgapw 40698. (Contributed by Stefan O'Rear, 18-Sep-2014.)

Assertion
Ref Expression
pellfundex (𝐷 ∈ (ℕ ∖ ◻NN) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))

Proof of Theorem pellfundex
Dummy variables 𝑎 𝑏 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 2re 12047 . . . 4 2 ∈ ℝ
2 pellfundre 40703 . . . 4 (𝐷 ∈ (ℕ ∖ ◻NN) → (PellFund‘𝐷) ∈ ℝ)
3 remulcl 10956 . . . 4 ((2 ∈ ℝ ∧ (PellFund‘𝐷) ∈ ℝ) → (2 · (PellFund‘𝐷)) ∈ ℝ)
41, 2, 3sylancr 587 . . 3 (𝐷 ∈ (ℕ ∖ ◻NN) → (2 · (PellFund‘𝐷)) ∈ ℝ)
5 0red 10978 . . . . . . 7 (𝐷 ∈ (ℕ ∖ ◻NN) → 0 ∈ ℝ)
6 1red 10976 . . . . . . 7 (𝐷 ∈ (ℕ ∖ ◻NN) → 1 ∈ ℝ)
7 0lt1 11497 . . . . . . . 8 0 < 1
87a1i 11 . . . . . . 7 (𝐷 ∈ (ℕ ∖ ◻NN) → 0 < 1)
9 pellfundgt1 40705 . . . . . . 7 (𝐷 ∈ (ℕ ∖ ◻NN) → 1 < (PellFund‘𝐷))
105, 6, 2, 8, 9lttrd 11136 . . . . . 6 (𝐷 ∈ (ℕ ∖ ◻NN) → 0 < (PellFund‘𝐷))
112, 10elrpd 12769 . . . . 5 (𝐷 ∈ (ℕ ∖ ◻NN) → (PellFund‘𝐷) ∈ ℝ+)
122, 11ltaddrpd 12805 . . . 4 (𝐷 ∈ (ℕ ∖ ◻NN) → (PellFund‘𝐷) < ((PellFund‘𝐷) + (PellFund‘𝐷)))
132recnd 11003 . . . . 5 (𝐷 ∈ (ℕ ∖ ◻NN) → (PellFund‘𝐷) ∈ ℂ)
14132timesd 12216 . . . 4 (𝐷 ∈ (ℕ ∖ ◻NN) → (2 · (PellFund‘𝐷)) = ((PellFund‘𝐷) + (PellFund‘𝐷)))
1512, 14breqtrrd 5102 . . 3 (𝐷 ∈ (ℕ ∖ ◻NN) → (PellFund‘𝐷) < (2 · (PellFund‘𝐷)))
16 pellfundglb 40707 . . 3 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (2 · (PellFund‘𝐷)) ∈ ℝ ∧ (PellFund‘𝐷) < (2 · (PellFund‘𝐷))) → ∃𝑎 ∈ (Pell1QR‘𝐷)((PellFund‘𝐷) ≤ 𝑎𝑎 < (2 · (PellFund‘𝐷))))
174, 15, 16mpd3an23 1462 . 2 (𝐷 ∈ (ℕ ∖ ◻NN) → ∃𝑎 ∈ (Pell1QR‘𝐷)((PellFund‘𝐷) ≤ 𝑎𝑎 < (2 · (PellFund‘𝐷))))
182adantr 481 . . . . . 6 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → (PellFund‘𝐷) ∈ ℝ)
19 pell1qrss14 40690 . . . . . . . 8 (𝐷 ∈ (ℕ ∖ ◻NN) → (Pell1QR‘𝐷) ⊆ (Pell14QR‘𝐷))
2019sselda 3921 . . . . . . 7 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → 𝑎 ∈ (Pell14QR‘𝐷))
21 pell14qrre 40679 . . . . . . 7 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell14QR‘𝐷)) → 𝑎 ∈ ℝ)
2220, 21syldan 591 . . . . . 6 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → 𝑎 ∈ ℝ)
2318, 22leloed 11118 . . . . 5 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → ((PellFund‘𝐷) ≤ 𝑎 ↔ ((PellFund‘𝐷) < 𝑎 ∨ (PellFund‘𝐷) = 𝑎)))
24 simp-4l 780 . . . . . . . . 9 (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏𝑏 < 𝑎)) → 𝐷 ∈ (ℕ ∖ ◻NN))
25 simp-4r 781 . . . . . . . . 9 (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏𝑏 < 𝑎)) → 𝑎 ∈ (Pell1QR‘𝐷))
26 simplr 766 . . . . . . . . 9 (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏𝑏 < 𝑎)) → 𝑏 ∈ (Pell1QR‘𝐷))
27 simprr 770 . . . . . . . . 9 (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏𝑏 < 𝑎)) → 𝑏 < 𝑎)
2822ad3antrrr 727 . . . . . . . . . 10 (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏𝑏 < 𝑎)) → 𝑎 ∈ ℝ)
294ad4antr 729 . . . . . . . . . 10 (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏𝑏 < 𝑎)) → (2 · (PellFund‘𝐷)) ∈ ℝ)
3019ad4antr 729 . . . . . . . . . . . . 13 (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏𝑏 < 𝑎)) → (Pell1QR‘𝐷) ⊆ (Pell14QR‘𝐷))
3130, 26sseldd 3922 . . . . . . . . . . . 12 (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏𝑏 < 𝑎)) → 𝑏 ∈ (Pell14QR‘𝐷))
32 pell14qrre 40679 . . . . . . . . . . . 12 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑏 ∈ (Pell14QR‘𝐷)) → 𝑏 ∈ ℝ)
3324, 31, 32syl2anc 584 . . . . . . . . . . 11 (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏𝑏 < 𝑎)) → 𝑏 ∈ ℝ)
34 remulcl 10956 . . . . . . . . . . 11 ((2 ∈ ℝ ∧ 𝑏 ∈ ℝ) → (2 · 𝑏) ∈ ℝ)
351, 33, 34sylancr 587 . . . . . . . . . 10 (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏𝑏 < 𝑎)) → (2 · 𝑏) ∈ ℝ)
36 simprr 770 . . . . . . . . . . 11 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) → 𝑎 < (2 · (PellFund‘𝐷)))
3736ad2antrr 723 . . . . . . . . . 10 (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏𝑏 < 𝑎)) → 𝑎 < (2 · (PellFund‘𝐷)))
38 simprl 768 . . . . . . . . . . 11 (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏𝑏 < 𝑎)) → (PellFund‘𝐷) ≤ 𝑏)
392ad4antr 729 . . . . . . . . . . . 12 (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏𝑏 < 𝑎)) → (PellFund‘𝐷) ∈ ℝ)
401a1i 11 . . . . . . . . . . . 12 (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏𝑏 < 𝑎)) → 2 ∈ ℝ)
41 2pos 12076 . . . . . . . . . . . . 13 0 < 2
4241a1i 11 . . . . . . . . . . . 12 (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏𝑏 < 𝑎)) → 0 < 2)
43 lemul2 11828 . . . . . . . . . . . 12 (((PellFund‘𝐷) ∈ ℝ ∧ 𝑏 ∈ ℝ ∧ (2 ∈ ℝ ∧ 0 < 2)) → ((PellFund‘𝐷) ≤ 𝑏 ↔ (2 · (PellFund‘𝐷)) ≤ (2 · 𝑏)))
4439, 33, 40, 42, 43syl112anc 1373 . . . . . . . . . . 11 (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏𝑏 < 𝑎)) → ((PellFund‘𝐷) ≤ 𝑏 ↔ (2 · (PellFund‘𝐷)) ≤ (2 · 𝑏)))
4538, 44mpbid 231 . . . . . . . . . 10 (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏𝑏 < 𝑎)) → (2 · (PellFund‘𝐷)) ≤ (2 · 𝑏))
4628, 29, 35, 37, 45ltletrd 11135 . . . . . . . . 9 (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏𝑏 < 𝑎)) → 𝑎 < (2 · 𝑏))
47 simp1 1135 . . . . . . . . . 10 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → 𝐷 ∈ (ℕ ∖ ◻NN))
48193ad2ant1 1132 . . . . . . . . . . . 12 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → (Pell1QR‘𝐷) ⊆ (Pell14QR‘𝐷))
49 simp2l 1198 . . . . . . . . . . . 12 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → 𝑎 ∈ (Pell1QR‘𝐷))
5048, 49sseldd 3922 . . . . . . . . . . 11 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → 𝑎 ∈ (Pell14QR‘𝐷))
51 simp2r 1199 . . . . . . . . . . . 12 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → 𝑏 ∈ (Pell1QR‘𝐷))
5248, 51sseldd 3922 . . . . . . . . . . 11 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → 𝑏 ∈ (Pell14QR‘𝐷))
53 pell14qrdivcl 40687 . . . . . . . . . . 11 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell14QR‘𝐷) ∧ 𝑏 ∈ (Pell14QR‘𝐷)) → (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷))
5447, 50, 52, 53syl3anc 1370 . . . . . . . . . 10 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷))
5547, 52, 32syl2anc 584 . . . . . . . . . . . . . 14 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → 𝑏 ∈ ℝ)
5655recnd 11003 . . . . . . . . . . . . 13 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → 𝑏 ∈ ℂ)
5756mulid2d 10993 . . . . . . . . . . . 12 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → (1 · 𝑏) = 𝑏)
58 simp3l 1200 . . . . . . . . . . . 12 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → 𝑏 < 𝑎)
5957, 58eqbrtrd 5096 . . . . . . . . . . 11 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → (1 · 𝑏) < 𝑎)
60 1red 10976 . . . . . . . . . . . 12 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → 1 ∈ ℝ)
6147, 50, 21syl2anc 584 . . . . . . . . . . . 12 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → 𝑎 ∈ ℝ)
62 pell14qrgt0 40681 . . . . . . . . . . . . 13 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑏 ∈ (Pell14QR‘𝐷)) → 0 < 𝑏)
6347, 52, 62syl2anc 584 . . . . . . . . . . . 12 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → 0 < 𝑏)
64 ltmuldiv 11848 . . . . . . . . . . . 12 ((1 ∈ ℝ ∧ 𝑎 ∈ ℝ ∧ (𝑏 ∈ ℝ ∧ 0 < 𝑏)) → ((1 · 𝑏) < 𝑎 ↔ 1 < (𝑎 / 𝑏)))
6560, 61, 55, 63, 64syl112anc 1373 . . . . . . . . . . 11 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → ((1 · 𝑏) < 𝑎 ↔ 1 < (𝑎 / 𝑏)))
6659, 65mpbid 231 . . . . . . . . . 10 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → 1 < (𝑎 / 𝑏))
67 simp3r 1201 . . . . . . . . . . 11 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → 𝑎 < (2 · 𝑏))
681a1i 11 . . . . . . . . . . . 12 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → 2 ∈ ℝ)
69 ltdivmul2 11852 . . . . . . . . . . . 12 ((𝑎 ∈ ℝ ∧ 2 ∈ ℝ ∧ (𝑏 ∈ ℝ ∧ 0 < 𝑏)) → ((𝑎 / 𝑏) < 2 ↔ 𝑎 < (2 · 𝑏)))
7061, 68, 55, 63, 69syl112anc 1373 . . . . . . . . . . 11 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → ((𝑎 / 𝑏) < 2 ↔ 𝑎 < (2 · 𝑏)))
7167, 70mpbird 256 . . . . . . . . . 10 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → (𝑎 / 𝑏) < 2)
72 simprr 770 . . . . . . . . . . 11 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) ∧ (1 < (𝑎 / 𝑏) ∧ (𝑎 / 𝑏) < 2)) → (𝑎 / 𝑏) < 2)
73 simpll 764 . . . . . . . . . . . . 13 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) ∧ (1 < (𝑎 / 𝑏) ∧ (𝑎 / 𝑏) < 2)) → 𝐷 ∈ (ℕ ∖ ◻NN))
74 simplr 766 . . . . . . . . . . . . 13 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) ∧ (1 < (𝑎 / 𝑏) ∧ (𝑎 / 𝑏) < 2)) → (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷))
75 simprl 768 . . . . . . . . . . . . 13 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) ∧ (1 < (𝑎 / 𝑏) ∧ (𝑎 / 𝑏) < 2)) → 1 < (𝑎 / 𝑏))
76 pell14qrgapw 40698 . . . . . . . . . . . . 13 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷) ∧ 1 < (𝑎 / 𝑏)) → 2 < (𝑎 / 𝑏))
7773, 74, 75, 76syl3anc 1370 . . . . . . . . . . . 12 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) ∧ (1 < (𝑎 / 𝑏) ∧ (𝑎 / 𝑏) < 2)) → 2 < (𝑎 / 𝑏))
78 pell14qrre 40679 . . . . . . . . . . . . . 14 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) → (𝑎 / 𝑏) ∈ ℝ)
7978adantr 481 . . . . . . . . . . . . 13 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) ∧ (1 < (𝑎 / 𝑏) ∧ (𝑎 / 𝑏) < 2)) → (𝑎 / 𝑏) ∈ ℝ)
80 ltnsym 11073 . . . . . . . . . . . . 13 ((2 ∈ ℝ ∧ (𝑎 / 𝑏) ∈ ℝ) → (2 < (𝑎 / 𝑏) → ¬ (𝑎 / 𝑏) < 2))
811, 79, 80sylancr 587 . . . . . . . . . . . 12 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) ∧ (1 < (𝑎 / 𝑏) ∧ (𝑎 / 𝑏) < 2)) → (2 < (𝑎 / 𝑏) → ¬ (𝑎 / 𝑏) < 2))
8277, 81mpd 15 . . . . . . . . . . 11 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) ∧ (1 < (𝑎 / 𝑏) ∧ (𝑎 / 𝑏) < 2)) → ¬ (𝑎 / 𝑏) < 2)
8372, 82pm2.21dd 194 . . . . . . . . . 10 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) ∧ (1 < (𝑎 / 𝑏) ∧ (𝑎 / 𝑏) < 2)) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))
8447, 54, 66, 71, 83syl22anc 836 . . . . . . . . 9 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))
8524, 25, 26, 27, 46, 84syl122anc 1378 . . . . . . . 8 (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏𝑏 < 𝑎)) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))
86 simpll 764 . . . . . . . . 9 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) → 𝐷 ∈ (ℕ ∖ ◻NN))
8722adantr 481 . . . . . . . . 9 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) → 𝑎 ∈ ℝ)
88 simprl 768 . . . . . . . . 9 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) → (PellFund‘𝐷) < 𝑎)
89 pellfundglb 40707 . . . . . . . . 9 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ ℝ ∧ (PellFund‘𝐷) < 𝑎) → ∃𝑏 ∈ (Pell1QR‘𝐷)((PellFund‘𝐷) ≤ 𝑏𝑏 < 𝑎))
9086, 87, 88, 89syl3anc 1370 . . . . . . . 8 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) → ∃𝑏 ∈ (Pell1QR‘𝐷)((PellFund‘𝐷) ≤ 𝑏𝑏 < 𝑎))
9185, 90r19.29a 3218 . . . . . . 7 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))
9291exp32 421 . . . . . 6 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → ((PellFund‘𝐷) < 𝑎 → (𝑎 < (2 · (PellFund‘𝐷)) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))))
93 simp2 1136 . . . . . . . 8 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ (PellFund‘𝐷) = 𝑎𝑎 < (2 · (PellFund‘𝐷))) → (PellFund‘𝐷) = 𝑎)
94 simp1r 1197 . . . . . . . 8 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ (PellFund‘𝐷) = 𝑎𝑎 < (2 · (PellFund‘𝐷))) → 𝑎 ∈ (Pell1QR‘𝐷))
9593, 94eqeltrd 2839 . . . . . . 7 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ (PellFund‘𝐷) = 𝑎𝑎 < (2 · (PellFund‘𝐷))) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))
96953exp 1118 . . . . . 6 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → ((PellFund‘𝐷) = 𝑎 → (𝑎 < (2 · (PellFund‘𝐷)) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))))
9792, 96jaod 856 . . . . 5 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → (((PellFund‘𝐷) < 𝑎 ∨ (PellFund‘𝐷) = 𝑎) → (𝑎 < (2 · (PellFund‘𝐷)) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))))
9823, 97sylbid 239 . . . 4 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → ((PellFund‘𝐷) ≤ 𝑎 → (𝑎 < (2 · (PellFund‘𝐷)) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))))
9998impd 411 . . 3 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → (((PellFund‘𝐷) ≤ 𝑎𝑎 < (2 · (PellFund‘𝐷))) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷)))
10099rexlimdva 3213 . 2 (𝐷 ∈ (ℕ ∖ ◻NN) → (∃𝑎 ∈ (Pell1QR‘𝐷)((PellFund‘𝐷) ≤ 𝑎𝑎 < (2 · (PellFund‘𝐷))) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷)))
10117, 100mpd 15 1 (𝐷 ∈ (ℕ ∖ ◻NN) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wb 205  wa 396  wo 844  w3a 1086   = wceq 1539  wcel 2106  wrex 3065  cdif 3884  wss 3887   class class class wbr 5074  cfv 6433  (class class class)co 7275  cr 10870  0cc0 10871  1c1 10872   + caddc 10874   · cmul 10876   < clt 11009  cle 11010   / cdiv 11632  cn 11973  2c2 12028  NNcsquarenn 40658  Pell1QRcpell1qr 40659  Pell14QRcpell14qr 40661  PellFundcpellfund 40662
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-10 2137  ax-11 2154  ax-12 2171  ax-ext 2709  ax-rep 5209  ax-sep 5223  ax-nul 5230  ax-pow 5288  ax-pr 5352  ax-un 7588  ax-inf2 9399  ax-cnex 10927  ax-resscn 10928  ax-1cn 10929  ax-icn 10930  ax-addcl 10931  ax-addrcl 10932  ax-mulcl 10933  ax-mulrcl 10934  ax-mulcom 10935  ax-addass 10936  ax-mulass 10937  ax-distr 10938  ax-i2m1 10939  ax-1ne0 10940  ax-1rid 10941  ax-rnegex 10942  ax-rrecex 10943  ax-cnre 10944  ax-pre-lttri 10945  ax-pre-lttrn 10946  ax-pre-ltadd 10947  ax-pre-mulgt0 10948  ax-pre-sup 10949
This theorem depends on definitions:  df-bi 206  df-an 397  df-or 845  df-3or 1087  df-3an 1088  df-tru 1542  df-fal 1552  df-ex 1783  df-nf 1787  df-sb 2068  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2816  df-nfc 2889  df-ne 2944  df-nel 3050  df-ral 3069  df-rex 3070  df-rmo 3071  df-reu 3072  df-rab 3073  df-v 3434  df-sbc 3717  df-csb 3833  df-dif 3890  df-un 3892  df-in 3894  df-ss 3904  df-pss 3906  df-nul 4257  df-if 4460  df-pw 4535  df-sn 4562  df-pr 4564  df-op 4568  df-uni 4840  df-int 4880  df-iun 4926  df-br 5075  df-opab 5137  df-mpt 5158  df-tr 5192  df-id 5489  df-eprel 5495  df-po 5503  df-so 5504  df-fr 5544  df-se 5545  df-we 5546  df-xp 5595  df-rel 5596  df-cnv 5597  df-co 5598  df-dm 5599  df-rn 5600  df-res 5601  df-ima 5602  df-pred 6202  df-ord 6269  df-on 6270  df-lim 6271  df-suc 6272  df-iota 6391  df-fun 6435  df-fn 6436  df-f 6437  df-f1 6438  df-fo 6439  df-f1o 6440  df-fv 6441  df-isom 6442  df-riota 7232  df-ov 7278  df-oprab 7279  df-mpo 7280  df-om 7713  df-1st 7831  df-2nd 7832  df-frecs 8097  df-wrecs 8128  df-recs 8202  df-rdg 8241  df-1o 8297  df-oadd 8301  df-omul 8302  df-er 8498  df-map 8617  df-en 8734  df-dom 8735  df-sdom 8736  df-fin 8737  df-sup 9201  df-inf 9202  df-oi 9269  df-card 9697  df-acn 9700  df-pnf 11011  df-mnf 11012  df-xr 11013  df-ltxr 11014  df-le 11015  df-sub 11207  df-neg 11208  df-div 11633  df-nn 11974  df-2 12036  df-3 12037  df-n0 12234  df-xnn0 12306  df-z 12320  df-uz 12583  df-q 12689  df-rp 12731  df-ico 13085  df-fz 13240  df-fl 13512  df-mod 13590  df-seq 13722  df-exp 13783  df-hash 14045  df-cj 14810  df-re 14811  df-im 14812  df-sqrt 14946  df-abs 14947  df-dvds 15964  df-gcd 16202  df-numer 16439  df-denom 16440  df-squarenn 40663  df-pell1qr 40664  df-pell14qr 40665  df-pell1234qr 40666  df-pellfund 40667
This theorem is referenced by:  pellfund14  40720  pellfund14b  40721
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