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Theorem pellfundex 38128
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 38118. (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 11346 . . . 4 2 ∈ ℝ
2 pellfundre 38123 . . . 4 (𝐷 ∈ (ℕ ∖ ◻NN) → (PellFund‘𝐷) ∈ ℝ)
3 remulcl 10274 . . . 4 ((2 ∈ ℝ ∧ (PellFund‘𝐷) ∈ ℝ) → (2 · (PellFund‘𝐷)) ∈ ℝ)
41, 2, 3sylancr 581 . . 3 (𝐷 ∈ (ℕ ∖ ◻NN) → (2 · (PellFund‘𝐷)) ∈ ℝ)
5 0red 10297 . . . . . . 7 (𝐷 ∈ (ℕ ∖ ◻NN) → 0 ∈ ℝ)
6 1red 10294 . . . . . . 7 (𝐷 ∈ (ℕ ∖ ◻NN) → 1 ∈ ℝ)
7 0lt1 10804 . . . . . . . 8 0 < 1
87a1i 11 . . . . . . 7 (𝐷 ∈ (ℕ ∖ ◻NN) → 0 < 1)
9 pellfundgt1 38125 . . . . . . 7 (𝐷 ∈ (ℕ ∖ ◻NN) → 1 < (PellFund‘𝐷))
105, 6, 2, 8, 9lttrd 10452 . . . . . 6 (𝐷 ∈ (ℕ ∖ ◻NN) → 0 < (PellFund‘𝐷))
112, 10elrpd 12067 . . . . 5 (𝐷 ∈ (ℕ ∖ ◻NN) → (PellFund‘𝐷) ∈ ℝ+)
122, 11ltaddrpd 12103 . . . 4 (𝐷 ∈ (ℕ ∖ ◻NN) → (PellFund‘𝐷) < ((PellFund‘𝐷) + (PellFund‘𝐷)))
132recnd 10322 . . . . 5 (𝐷 ∈ (ℕ ∖ ◻NN) → (PellFund‘𝐷) ∈ ℂ)
14132timesd 11521 . . . 4 (𝐷 ∈ (ℕ ∖ ◻NN) → (2 · (PellFund‘𝐷)) = ((PellFund‘𝐷) + (PellFund‘𝐷)))
1512, 14breqtrrd 4837 . . 3 (𝐷 ∈ (ℕ ∖ ◻NN) → (PellFund‘𝐷) < (2 · (PellFund‘𝐷)))
16 pellfundglb 38127 . . 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 1587 . 2 (𝐷 ∈ (ℕ ∖ ◻NN) → ∃𝑎 ∈ (Pell1QR‘𝐷)((PellFund‘𝐷) ≤ 𝑎𝑎 < (2 · (PellFund‘𝐷))))
182adantr 472 . . . . . 6 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → (PellFund‘𝐷) ∈ ℝ)
19 pell1qrss14 38110 . . . . . . . 8 (𝐷 ∈ (ℕ ∖ ◻NN) → (Pell1QR‘𝐷) ⊆ (Pell14QR‘𝐷))
2019sselda 3761 . . . . . . 7 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → 𝑎 ∈ (Pell14QR‘𝐷))
21 pell14qrre 38099 . . . . . . 7 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell14QR‘𝐷)) → 𝑎 ∈ ℝ)
2220, 21syldan 585 . . . . . 6 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → 𝑎 ∈ ℝ)
2318, 22leloed 10434 . . . . 5 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → ((PellFund‘𝐷) ≤ 𝑎 ↔ ((PellFund‘𝐷) < 𝑎 ∨ (PellFund‘𝐷) = 𝑎)))
24 simp-4l 801 . . . . . . . . 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 803 . . . . . . . . 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 785 . . . . . . . . 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 789 . . . . . . . . 9 (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏𝑏 < 𝑎)) → 𝑏 < 𝑎)
2822ad3antrrr 721 . . . . . . . . . 10 (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏𝑏 < 𝑎)) → 𝑎 ∈ ℝ)
294ad4antr 724 . . . . . . . . . 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 724 . . . . . . . . . . . . 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 3762 . . . . . . . . . . . 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 38099 . . . . . . . . . . . 12 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑏 ∈ (Pell14QR‘𝐷)) → 𝑏 ∈ ℝ)
3324, 31, 32syl2anc 579 . . . . . . . . . . 11 (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏𝑏 < 𝑎)) → 𝑏 ∈ ℝ)
34 remulcl 10274 . . . . . . . . . . 11 ((2 ∈ ℝ ∧ 𝑏 ∈ ℝ) → (2 · 𝑏) ∈ ℝ)
351, 33, 34sylancr 581 . . . . . . . . . 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 789 . . . . . . . . . . 11 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) → 𝑎 < (2 · (PellFund‘𝐷)))
3736ad2antrr 717 . . . . . . . . . 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 787 . . . . . . . . . . 11 (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏𝑏 < 𝑎)) → (PellFund‘𝐷) ≤ 𝑏)
392ad4antr 724 . . . . . . . . . . . 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 11382 . . . . . . . . . . . . 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 11130 . . . . . . . . . . . 12 (((PellFund‘𝐷) ∈ ℝ ∧ 𝑏 ∈ ℝ ∧ (2 ∈ ℝ ∧ 0 < 2)) → ((PellFund‘𝐷) ≤ 𝑏 ↔ (2 · (PellFund‘𝐷)) ≤ (2 · 𝑏)))
4439, 33, 40, 42, 43syl112anc 1493 . . . . . . . . . . 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 223 . . . . . . . . . 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 10451 . . . . . . . . 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 1166 . . . . . . . . . 10 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → 𝐷 ∈ (ℕ ∖ ◻NN))
48193ad2ant1 1163 . . . . . . . . . . . 12 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → (Pell1QR‘𝐷) ⊆ (Pell14QR‘𝐷))
49 simp2l 1256 . . . . . . . . . . . 12 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → 𝑎 ∈ (Pell1QR‘𝐷))
5048, 49sseldd 3762 . . . . . . . . . . 11 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → 𝑎 ∈ (Pell14QR‘𝐷))
51 simp2r 1257 . . . . . . . . . . . 12 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → 𝑏 ∈ (Pell1QR‘𝐷))
5248, 51sseldd 3762 . . . . . . . . . . 11 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → 𝑏 ∈ (Pell14QR‘𝐷))
53 pell14qrdivcl 38107 . . . . . . . . . . 11 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell14QR‘𝐷) ∧ 𝑏 ∈ (Pell14QR‘𝐷)) → (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷))
5447, 50, 52, 53syl3anc 1490 . . . . . . . . . 10 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷))
5547, 52, 32syl2anc 579 . . . . . . . . . . . . . 14 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → 𝑏 ∈ ℝ)
5655recnd 10322 . . . . . . . . . . . . 13 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → 𝑏 ∈ ℂ)
5756mulid2d 10312 . . . . . . . . . . . 12 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → (1 · 𝑏) = 𝑏)
58 simp3l 1258 . . . . . . . . . . . 12 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → 𝑏 < 𝑎)
5957, 58eqbrtrd 4831 . . . . . . . . . . 11 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → (1 · 𝑏) < 𝑎)
60 1red 10294 . . . . . . . . . . . 12 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → 1 ∈ ℝ)
6147, 50, 21syl2anc 579 . . . . . . . . . . . 12 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → 𝑎 ∈ ℝ)
62 pell14qrgt0 38101 . . . . . . . . . . . . 13 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑏 ∈ (Pell14QR‘𝐷)) → 0 < 𝑏)
6347, 52, 62syl2anc 579 . . . . . . . . . . . 12 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → 0 < 𝑏)
64 ltmuldiv 11150 . . . . . . . . . . . 12 ((1 ∈ ℝ ∧ 𝑎 ∈ ℝ ∧ (𝑏 ∈ ℝ ∧ 0 < 𝑏)) → ((1 · 𝑏) < 𝑎 ↔ 1 < (𝑎 / 𝑏)))
6560, 61, 55, 63, 64syl112anc 1493 . . . . . . . . . . 11 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → ((1 · 𝑏) < 𝑎 ↔ 1 < (𝑎 / 𝑏)))
6659, 65mpbid 223 . . . . . . . . . 10 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → 1 < (𝑎 / 𝑏))
67 simp3r 1259 . . . . . . . . . . 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 11154 . . . . . . . . . . . 12 ((𝑎 ∈ ℝ ∧ 2 ∈ ℝ ∧ (𝑏 ∈ ℝ ∧ 0 < 𝑏)) → ((𝑎 / 𝑏) < 2 ↔ 𝑎 < (2 · 𝑏)))
7061, 68, 55, 63, 69syl112anc 1493 . . . . . . . . . . 11 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → ((𝑎 / 𝑏) < 2 ↔ 𝑎 < (2 · 𝑏)))
7167, 70mpbird 248 . . . . . . . . . 10 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → (𝑎 / 𝑏) < 2)
72 simprr 789 . . . . . . . . . . 11 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) ∧ (1 < (𝑎 / 𝑏) ∧ (𝑎 / 𝑏) < 2)) → (𝑎 / 𝑏) < 2)
73 simpll 783 . . . . . . . . . . . . 13 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) ∧ (1 < (𝑎 / 𝑏) ∧ (𝑎 / 𝑏) < 2)) → 𝐷 ∈ (ℕ ∖ ◻NN))
74 simplr 785 . . . . . . . . . . . . 13 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) ∧ (1 < (𝑎 / 𝑏) ∧ (𝑎 / 𝑏) < 2)) → (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷))
75 simprl 787 . . . . . . . . . . . . 13 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) ∧ (1 < (𝑎 / 𝑏) ∧ (𝑎 / 𝑏) < 2)) → 1 < (𝑎 / 𝑏))
76 pell14qrgapw 38118 . . . . . . . . . . . . 13 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷) ∧ 1 < (𝑎 / 𝑏)) → 2 < (𝑎 / 𝑏))
7773, 74, 75, 76syl3anc 1490 . . . . . . . . . . . 12 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) ∧ (1 < (𝑎 / 𝑏) ∧ (𝑎 / 𝑏) < 2)) → 2 < (𝑎 / 𝑏))
78 pell14qrre 38099 . . . . . . . . . . . . . 14 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) → (𝑎 / 𝑏) ∈ ℝ)
7978adantr 472 . . . . . . . . . . . . 13 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) ∧ (1 < (𝑎 / 𝑏) ∧ (𝑎 / 𝑏) < 2)) → (𝑎 / 𝑏) ∈ ℝ)
80 ltnsym 10389 . . . . . . . . . . . . 13 ((2 ∈ ℝ ∧ (𝑎 / 𝑏) ∈ ℝ) → (2 < (𝑎 / 𝑏) → ¬ (𝑎 / 𝑏) < 2))
811, 79, 80sylancr 581 . . . . . . . . . . . 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 186 . . . . . . . . . 10 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) ∧ (1 < (𝑎 / 𝑏) ∧ (𝑎 / 𝑏) < 2)) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))
8447, 54, 66, 71, 83syl22anc 867 . . . . . . . . 9 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎𝑎 < (2 · 𝑏))) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))
8524, 25, 26, 27, 46, 84syl122anc 1498 . . . . . . . 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 783 . . . . . . . . 9 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) → 𝐷 ∈ (ℕ ∖ ◻NN))
8722adantr 472 . . . . . . . . 9 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) → 𝑎 ∈ ℝ)
88 simprl 787 . . . . . . . . 9 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) → (PellFund‘𝐷) < 𝑎)
89 pellfundglb 38127 . . . . . . . . 9 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ ℝ ∧ (PellFund‘𝐷) < 𝑎) → ∃𝑏 ∈ (Pell1QR‘𝐷)((PellFund‘𝐷) ≤ 𝑏𝑏 < 𝑎))
9086, 87, 88, 89syl3anc 1490 . . . . . . . 8 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) → ∃𝑏 ∈ (Pell1QR‘𝐷)((PellFund‘𝐷) ≤ 𝑏𝑏 < 𝑎))
9185, 90r19.29a 3225 . . . . . . 7 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎𝑎 < (2 · (PellFund‘𝐷)))) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))
9291exp32 411 . . . . . 6 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → ((PellFund‘𝐷) < 𝑎 → (𝑎 < (2 · (PellFund‘𝐷)) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))))
93 simp2 1167 . . . . . . . 8 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ (PellFund‘𝐷) = 𝑎𝑎 < (2 · (PellFund‘𝐷))) → (PellFund‘𝐷) = 𝑎)
94 simp1r 1255 . . . . . . . 8 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ (PellFund‘𝐷) = 𝑎𝑎 < (2 · (PellFund‘𝐷))) → 𝑎 ∈ (Pell1QR‘𝐷))
9593, 94eqeltrd 2844 . . . . . . 7 (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ (PellFund‘𝐷) = 𝑎𝑎 < (2 · (PellFund‘𝐷))) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))
96953exp 1148 . . . . . 6 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → ((PellFund‘𝐷) = 𝑎 → (𝑎 < (2 · (PellFund‘𝐷)) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))))
9792, 96jaod 885 . . . . 5 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → (((PellFund‘𝐷) < 𝑎 ∨ (PellFund‘𝐷) = 𝑎) → (𝑎 < (2 · (PellFund‘𝐷)) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))))
9823, 97sylbid 231 . . . 4 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → ((PellFund‘𝐷) ≤ 𝑎 → (𝑎 < (2 · (PellFund‘𝐷)) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))))
9998impd 398 . . 3 ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → (((PellFund‘𝐷) ≤ 𝑎𝑎 < (2 · (PellFund‘𝐷))) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷)))
10099rexlimdva 3178 . 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 197  wa 384  wo 873  w3a 1107   = wceq 1652  wcel 2155  wrex 3056  cdif 3729  wss 3732   class class class wbr 4809  cfv 6068  (class class class)co 6842  cr 10188  0cc0 10189  1c1 10190   + caddc 10192   · cmul 10194   < clt 10328  cle 10329   / cdiv 10938  cn 11274  2c2 11327  NNcsquarenn 38078  Pell1QRcpell1qr 38079  Pell14QRcpell14qr 38081  PellFundcpellfund 38082
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1890  ax-4 1904  ax-5 2005  ax-6 2070  ax-7 2105  ax-8 2157  ax-9 2164  ax-10 2183  ax-11 2198  ax-12 2211  ax-13 2352  ax-ext 2743  ax-rep 4930  ax-sep 4941  ax-nul 4949  ax-pow 5001  ax-pr 5062  ax-un 7147  ax-inf2 8753  ax-cnex 10245  ax-resscn 10246  ax-1cn 10247  ax-icn 10248  ax-addcl 10249  ax-addrcl 10250  ax-mulcl 10251  ax-mulrcl 10252  ax-mulcom 10253  ax-addass 10254  ax-mulass 10255  ax-distr 10256  ax-i2m1 10257  ax-1ne0 10258  ax-1rid 10259  ax-rnegex 10260  ax-rrecex 10261  ax-cnre 10262  ax-pre-lttri 10263  ax-pre-lttrn 10264  ax-pre-ltadd 10265  ax-pre-mulgt0 10266  ax-pre-sup 10267
This theorem depends on definitions:  df-bi 198  df-an 385  df-or 874  df-3or 1108  df-3an 1109  df-tru 1656  df-ex 1875  df-nf 1879  df-sb 2063  df-mo 2565  df-eu 2582  df-clab 2752  df-cleq 2758  df-clel 2761  df-nfc 2896  df-ne 2938  df-nel 3041  df-ral 3060  df-rex 3061  df-reu 3062  df-rmo 3063  df-rab 3064  df-v 3352  df-sbc 3597  df-csb 3692  df-dif 3735  df-un 3737  df-in 3739  df-ss 3746  df-pss 3748  df-nul 4080  df-if 4244  df-pw 4317  df-sn 4335  df-pr 4337  df-tp 4339  df-op 4341  df-uni 4595  df-int 4634  df-iun 4678  df-br 4810  df-opab 4872  df-mpt 4889  df-tr 4912  df-id 5185  df-eprel 5190  df-po 5198  df-so 5199  df-fr 5236  df-se 5237  df-we 5238  df-xp 5283  df-rel 5284  df-cnv 5285  df-co 5286  df-dm 5287  df-rn 5288  df-res 5289  df-ima 5290  df-pred 5865  df-ord 5911  df-on 5912  df-lim 5913  df-suc 5914  df-iota 6031  df-fun 6070  df-fn 6071  df-f 6072  df-f1 6073  df-fo 6074  df-f1o 6075  df-fv 6076  df-isom 6077  df-riota 6803  df-ov 6845  df-oprab 6846  df-mpt2 6847  df-om 7264  df-1st 7366  df-2nd 7367  df-wrecs 7610  df-recs 7672  df-rdg 7710  df-1o 7764  df-oadd 7768  df-omul 7769  df-er 7947  df-map 8062  df-en 8161  df-dom 8162  df-sdom 8163  df-fin 8164  df-sup 8555  df-inf 8556  df-oi 8622  df-card 9016  df-acn 9019  df-pnf 10330  df-mnf 10331  df-xr 10332  df-ltxr 10333  df-le 10334  df-sub 10522  df-neg 10523  df-div 10939  df-nn 11275  df-2 11335  df-3 11336  df-n0 11539  df-xnn0 11611  df-z 11625  df-uz 11887  df-q 11990  df-rp 12029  df-ico 12383  df-fz 12534  df-fl 12801  df-mod 12877  df-seq 13009  df-exp 13068  df-hash 13322  df-cj 14124  df-re 14125  df-im 14126  df-sqrt 14260  df-abs 14261  df-dvds 15266  df-gcd 15498  df-numer 15722  df-denom 15723  df-squarenn 38083  df-pell1qr 38084  df-pell14qr 38085  df-pell1234qr 38086  df-pellfund 38087
This theorem is referenced by:  pellfund14  38140  pellfund14b  38141
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