Theorem pellfundex 43613

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 43603. (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.

Step	Hyp	Ref	Expression
1		2re 12310	. . . 4 ⊢ 2 ∈ ℝ
2		pellfundre 43608	. . . 4 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (PellFund‘𝐷) ∈ ℝ)
3		remulcl 11180	. . . 4 ⊢ ((2 ∈ ℝ ∧ (PellFund‘𝐷) ∈ ℝ) → (2 · (PellFund‘𝐷)) ∈ ℝ)
4	1, 2, 3	sylancr 598	. . 3 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (2 · (PellFund‘𝐷)) ∈ ℝ)
5		0red 11206	. . . . . . 7 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 0 ∈ ℝ)
6		1red 11204	. . . . . . 7 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 1 ∈ ℝ)
7		0lt1 11731	. . . . . . . 8 ⊢ 0 < 1
8	7	a1i 11	. . . . . . 7 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 0 < 1)
9		pellfundgt1 43610	. . . . . . 7 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 1 < (PellFund‘𝐷))
10	5, 6, 2, 8, 9	lttrd 11366	. . . . . 6 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 0 < (PellFund‘𝐷))
11	2, 10	elrpd 13052	. . . . 5 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (PellFund‘𝐷) ∈ ℝ+)
12	2, 11	ltaddrpd 13088	. . . 4 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (PellFund‘𝐷) < ((PellFund‘𝐷) + (PellFund‘𝐷)))
13	2	recnd 11232	. . . . 5 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (PellFund‘𝐷) ∈ ℂ)
14	13	2timesd 12482	. . . 4 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (2 · (PellFund‘𝐷)) = ((PellFund‘𝐷) + (PellFund‘𝐷)))
15	12, 14	breqtrrd 5139	. . 3 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (PellFund‘𝐷) < (2 · (PellFund‘𝐷)))
16		pellfundglb 43612	. . 3 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (2 · (PellFund‘𝐷)) ∈ ℝ ∧ (PellFund‘𝐷) < (2 · (PellFund‘𝐷))) → ∃𝑎 ∈ (Pell1QR‘𝐷)((PellFund‘𝐷) ≤ 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷))))
17	4, 15, 16	mpd3an23 1492	. 2 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → ∃𝑎 ∈ (Pell1QR‘𝐷)((PellFund‘𝐷) ≤ 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷))))
18	2	adantr 485	. . . . . 6 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → (PellFund‘𝐷) ∈ ℝ)
19		pell1qrss14 43595	. . . . . . . 8 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (Pell1QR‘𝐷) ⊆ (Pell14QR‘𝐷))
20	19	sselda 3937	. . . . . . 7 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → 𝑎 ∈ (Pell14QR‘𝐷))
21		pell14qrre 43584	. . . . . . 7 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell14QR‘𝐷)) → 𝑎 ∈ ℝ)
22	20, 21	syldan 602	. . . . . 6 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → 𝑎 ∈ ℝ)
23	18, 22	leloed 11348	. . . . 5 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → ((PellFund‘𝐷) ≤ 𝑎 ↔ ((PellFund‘𝐷) < 𝑎 ∨ (PellFund‘𝐷) = 𝑎)))
24		simp-4l 794	. . . . . . . . 9 ⊢ (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏 ∧ 𝑏 < 𝑎)) → 𝐷 ∈ (ℕ ∖ ◻NN))
25		simp-4r 795	. . . . . . . . 9 ⊢ (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏 ∧ 𝑏 < 𝑎)) → 𝑎 ∈ (Pell1QR‘𝐷))
26		simplr 780	. . . . . . . . 9 ⊢ (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏 ∧ 𝑏 < 𝑎)) → 𝑏 ∈ (Pell1QR‘𝐷))
27		simprr 784	. . . . . . . . 9 ⊢ (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏 ∧ 𝑏 < 𝑎)) → 𝑏 < 𝑎)
28	22	ad3antrrr 742	. . . . . . . . . 10 ⊢ (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏 ∧ 𝑏 < 𝑎)) → 𝑎 ∈ ℝ)
29	4	ad4antr 744	. . . . . . . . . 10 ⊢ (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏 ∧ 𝑏 < 𝑎)) → (2 · (PellFund‘𝐷)) ∈ ℝ)
30	19	ad4antr 744	. . . . . . . . . . . . 13 ⊢ (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏 ∧ 𝑏 < 𝑎)) → (Pell1QR‘𝐷) ⊆ (Pell14QR‘𝐷))
31	30, 26	sseldd 3938	. . . . . . . . . . . 12 ⊢ (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏 ∧ 𝑏 < 𝑎)) → 𝑏 ∈ (Pell14QR‘𝐷))
32		pell14qrre 43584	. . . . . . . . . . . 12 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑏 ∈ (Pell14QR‘𝐷)) → 𝑏 ∈ ℝ)
33	24, 31, 32	syl2anc 595	. . . . . . . . . . 11 ⊢ (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏 ∧ 𝑏 < 𝑎)) → 𝑏 ∈ ℝ)
34		remulcl 11180	. . . . . . . . . . 11 ⊢ ((2 ∈ ℝ ∧ 𝑏 ∈ ℝ) → (2 · 𝑏) ∈ ℝ)
35	1, 33, 34	sylancr 598	. . . . . . . . . 10 ⊢ (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏 ∧ 𝑏 < 𝑎)) → (2 · 𝑏) ∈ ℝ)
36		simprr 784	. . . . . . . . . . 11 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷)))) → 𝑎 < (2 · (PellFund‘𝐷)))
37	36	ad2antrr 738	. . . . . . . . . 10 ⊢ (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏 ∧ 𝑏 < 𝑎)) → 𝑎 < (2 · (PellFund‘𝐷)))
38		simprl 782	. . . . . . . . . . 11 ⊢ (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏 ∧ 𝑏 < 𝑎)) → (PellFund‘𝐷) ≤ 𝑏)
39	2	ad4antr 744	. . . . . . . . . . . 12 ⊢ (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏 ∧ 𝑏 < 𝑎)) → (PellFund‘𝐷) ∈ ℝ)
40	1	a1i 11	. . . . . . . . . . . 12 ⊢ (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏 ∧ 𝑏 < 𝑎)) → 2 ∈ ℝ)
41		2pos 12340	. . . . . . . . . . . . 13 ⊢ 0 < 2
42	41	a1i 11	. . . . . . . . . . . 12 ⊢ (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏 ∧ 𝑏 < 𝑎)) → 0 < 2)
43		lemul2 12063	. . . . . . . . . . . 12 ⊢ (((PellFund‘𝐷) ∈ ℝ ∧ 𝑏 ∈ ℝ ∧ (2 ∈ ℝ ∧ 0 < 2)) → ((PellFund‘𝐷) ≤ 𝑏 ↔ (2 · (PellFund‘𝐷)) ≤ (2 · 𝑏)))
44	39, 33, 40, 42, 43	syl112anc 1401	. . . . . . . . . . 11 ⊢ (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏 ∧ 𝑏 < 𝑎)) → ((PellFund‘𝐷) ≤ 𝑏 ↔ (2 · (PellFund‘𝐷)) ≤ (2 · 𝑏)))
45	38, 44	mpbid 235	. . . . . . . . . 10 ⊢ (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏 ∧ 𝑏 < 𝑎)) → (2 · (PellFund‘𝐷)) ≤ (2 · 𝑏))
46	28, 29, 35, 37, 45	ltletrd 11365	. . . . . . . . 9 ⊢ (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏 ∧ 𝑏 < 𝑎)) → 𝑎 < (2 · 𝑏))
47		simp1 1154	. . . . . . . . . 10 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → 𝐷 ∈ (ℕ ∖ ◻NN))
48	19	3ad2ant1 1151	. . . . . . . . . . . 12 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → (Pell1QR‘𝐷) ⊆ (Pell14QR‘𝐷))
49		simp2l 1218	. . . . . . . . . . . 12 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → 𝑎 ∈ (Pell1QR‘𝐷))
50	48, 49	sseldd 3938	. . . . . . . . . . 11 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → 𝑎 ∈ (Pell14QR‘𝐷))
51		simp2r 1219	. . . . . . . . . . . 12 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → 𝑏 ∈ (Pell1QR‘𝐷))
52	48, 51	sseldd 3938	. . . . . . . . . . 11 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → 𝑏 ∈ (Pell14QR‘𝐷))
53		pell14qrdivcl 43592	. . . . . . . . . . 11 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell14QR‘𝐷) ∧ 𝑏 ∈ (Pell14QR‘𝐷)) → (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷))
54	47, 50, 52, 53	syl3anc 1398	. . . . . . . . . 10 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷))
55	47, 52, 32	syl2anc 595	. . . . . . . . . . . . . 14 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → 𝑏 ∈ ℝ)
56	55	recnd 11232	. . . . . . . . . . . . 13 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → 𝑏 ∈ ℂ)
57	56	mullidd 11222	. . . . . . . . . . . 12 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → (1 · 𝑏) = 𝑏)
58		simp3l 1220	. . . . . . . . . . . 12 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → 𝑏 < 𝑎)
59	57, 58	eqbrtrd 5133	. . . . . . . . . . 11 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → (1 · 𝑏) < 𝑎)
60		1red 11204	. . . . . . . . . . . 12 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → 1 ∈ ℝ)
61	47, 50, 21	syl2anc 595	. . . . . . . . . . . 12 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → 𝑎 ∈ ℝ)
62		pell14qrgt0 43586	. . . . . . . . . . . . 13 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑏 ∈ (Pell14QR‘𝐷)) → 0 < 𝑏)
63	47, 52, 62	syl2anc 595	. . . . . . . . . . . 12 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → 0 < 𝑏)
64		ltmuldiv 12083	. . . . . . . . . . . 12 ⊢ ((1 ∈ ℝ ∧ 𝑎 ∈ ℝ ∧ (𝑏 ∈ ℝ ∧ 0 < 𝑏)) → ((1 · 𝑏) < 𝑎 ↔ 1 < (𝑎 / 𝑏)))
65	60, 61, 55, 63, 64	syl112anc 1401	. . . . . . . . . . 11 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → ((1 · 𝑏) < 𝑎 ↔ 1 < (𝑎 / 𝑏)))
66	59, 65	mpbid 235	. . . . . . . . . 10 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → 1 < (𝑎 / 𝑏))
67		simp3r 1221	. . . . . . . . . . 11 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → 𝑎 < (2 · 𝑏))
68	1	a1i 11	. . . . . . . . . . . 12 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → 2 ∈ ℝ)
69		ltdivmul2 12087	. . . . . . . . . . . 12 ⊢ ((𝑎 ∈ ℝ ∧ 2 ∈ ℝ ∧ (𝑏 ∈ ℝ ∧ 0 < 𝑏)) → ((𝑎 / 𝑏) < 2 ↔ 𝑎 < (2 · 𝑏)))
70	61, 68, 55, 63, 69	syl112anc 1401	. . . . . . . . . . 11 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → ((𝑎 / 𝑏) < 2 ↔ 𝑎 < (2 · 𝑏)))
71	67, 70	mpbird 260	. . . . . . . . . 10 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → (𝑎 / 𝑏) < 2)
72		simprr 784	. . . . . . . . . . 11 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) ∧ (1 < (𝑎 / 𝑏) ∧ (𝑎 / 𝑏) < 2)) → (𝑎 / 𝑏) < 2)
73		simpll 778	. . . . . . . . . . . . 13 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) ∧ (1 < (𝑎 / 𝑏) ∧ (𝑎 / 𝑏) < 2)) → 𝐷 ∈ (ℕ ∖ ◻NN))
74		simplr 780	. . . . . . . . . . . . 13 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) ∧ (1 < (𝑎 / 𝑏) ∧ (𝑎 / 𝑏) < 2)) → (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷))
75		simprl 782	. . . . . . . . . . . . 13 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) ∧ (1 < (𝑎 / 𝑏) ∧ (𝑎 / 𝑏) < 2)) → 1 < (𝑎 / 𝑏))
76		pell14qrgapw 43603	. . . . . . . . . . . . 13 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷) ∧ 1 < (𝑎 / 𝑏)) → 2 < (𝑎 / 𝑏))
77	73, 74, 75, 76	syl3anc 1398	. . . . . . . . . . . 12 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) ∧ (1 < (𝑎 / 𝑏) ∧ (𝑎 / 𝑏) < 2)) → 2 < (𝑎 / 𝑏))
78		pell14qrre 43584	. . . . . . . . . . . . . 14 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) → (𝑎 / 𝑏) ∈ ℝ)
79	78	adantr 485	. . . . . . . . . . . . 13 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) ∧ (1 < (𝑎 / 𝑏) ∧ (𝑎 / 𝑏) < 2)) → (𝑎 / 𝑏) ∈ ℝ)
80		ltnsym 11303	. . . . . . . . . . . . 13 ⊢ ((2 ∈ ℝ ∧ (𝑎 / 𝑏) ∈ ℝ) → (2 < (𝑎 / 𝑏) → ¬ (𝑎 / 𝑏) < 2))
81	1, 79, 80	sylancr 598	. . . . . . . . . . . 12 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) ∧ (1 < (𝑎 / 𝑏) ∧ (𝑎 / 𝑏) < 2)) → (2 < (𝑎 / 𝑏) → ¬ (𝑎 / 𝑏) < 2))
82	77, 81	mpd 16	. . . . . . . . . . 11 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) ∧ (1 < (𝑎 / 𝑏) ∧ (𝑎 / 𝑏) < 2)) → ¬ (𝑎 / 𝑏) < 2)
83	72, 82	pm2.21dd 198	. . . . . . . . . 10 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) ∧ (1 < (𝑎 / 𝑏) ∧ (𝑎 / 𝑏) < 2)) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))
84	47, 54, 66, 71, 83	syl22anc 851	. . . . . . . . 9 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))
85	24, 25, 26, 27, 46, 84	syl122anc 1406	. . . . . . . 8 ⊢ (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷)))) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) ≤ 𝑏 ∧ 𝑏 < 𝑎)) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))
86		simpll 778	. . . . . . . . 9 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷)))) → 𝐷 ∈ (ℕ ∖ ◻NN))
87	22	adantr 485	. . . . . . . . 9 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷)))) → 𝑎 ∈ ℝ)
88		simprl 782	. . . . . . . . 9 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷)))) → (PellFund‘𝐷) < 𝑎)
89		pellfundglb 43612	. . . . . . . . 9 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ ℝ ∧ (PellFund‘𝐷) < 𝑎) → ∃𝑏 ∈ (Pell1QR‘𝐷)((PellFund‘𝐷) ≤ 𝑏 ∧ 𝑏 < 𝑎))
90	86, 87, 88, 89	syl3anc 1398	. . . . . . . 8 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷)))) → ∃𝑏 ∈ (Pell1QR‘𝐷)((PellFund‘𝐷) ≤ 𝑏 ∧ 𝑏 < 𝑎))
91	85, 90	r19.29a 3173	. . . . . . 7 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷)))) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))
92	91	exp32 425	. . . . . 6 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → ((PellFund‘𝐷) < 𝑎 → (𝑎 < (2 · (PellFund‘𝐷)) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))))
93		simp2 1155	. . . . . . . 8 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ (PellFund‘𝐷) = 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷))) → (PellFund‘𝐷) = 𝑎)
94		simp1r 1217	. . . . . . . 8 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ (PellFund‘𝐷) = 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷))) → 𝑎 ∈ (Pell1QR‘𝐷))
95	93, 94	eqeltrd 2863	. . . . . . 7 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ (PellFund‘𝐷) = 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷))) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))
96	95	3exp 1137	. . . . . 6 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → ((PellFund‘𝐷) = 𝑎 → (𝑎 < (2 · (PellFund‘𝐷)) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))))
97	92, 96	jaod 872	. . . . 5 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → (((PellFund‘𝐷) < 𝑎 ∨ (PellFund‘𝐷) = 𝑎) → (𝑎 < (2 · (PellFund‘𝐷)) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))))
98	23, 97	sylbid 243	. . . 4 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → ((PellFund‘𝐷) ≤ 𝑎 → (𝑎 < (2 · (PellFund‘𝐷)) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))))
99	98	impd 415	. . 3 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → (((PellFund‘𝐷) ≤ 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷))) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷)))
100	99	rexlimdva 3166	. 2 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (∃𝑎 ∈ (Pell1QR‘𝐷)((PellFund‘𝐷) ≤ 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷))) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷)))
101	17, 100	mpd 16	1 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))

Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 209   ∧ wa 400   ∨ wo 860   ∧ w3a 1103   = wceq 1570   ∈ wcel 2143  ∃wrex 3089   ∖ cdif 3902   ⊆ wss 3905   class class class wbr 5109  ‘cfv 6536  (class class class)co 7410  ℝcr 11094  0cc0 11095  1c1 11096   + caddc 11098   · cmul 11100   < clt 11238   ≤ cle 11239   / cdiv 11866  ℕcn 12228  2c2 12290  ◻_NNcsquarenn 43563  Pell1QRcpell1qr 43564  Pell14QRcpell14qr 43566  PellFundcpellfund 43567

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1825  ax-4 1839  ax-5 1940  ax-6 1997  ax-7 2038  ax-8 2145  ax-9 2153  ax-10 2176  ax-11 2192  ax-12 2213  ax-ext 2735  ax-rep 5238  ax-sep 5257  ax-nul 5269  ax-pow 5336  ax-pr 5404  ax-un 7732  ax-inf2 9606  ax-cnex 11151  ax-resscn 11152  ax-1cn 11153  ax-icn 11154  ax-addcl 11155  ax-addrcl 11156  ax-mulcl 11157  ax-mulrcl 11158  ax-mulcom 11159  ax-addass 11160  ax-mulass 11161  ax-distr 11162  ax-i2m1 11163  ax-1ne0 11164  ax-1rid 11165  ax-rnegex 11166  ax-rrecex 11167  ax-cnre 11168  ax-pre-lttri 11169  ax-pre-lttrn 11170  ax-pre-ltadd 11171  ax-pre-mulgt0 11172  ax-pre-sup 11173

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3or 1104  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1810  df-nf 1814  df-sb 2097  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2838  df-nfc 2912  df-ne 2959  df-nel 3065  df-ral 3080  df-rex 3090  df-rmo 3369  df-reu 3370  df-rab 3417  df-v 3457  df-sbc 3745  df-csb 3854  df-dif 3908  df-un 3910  df-in 3912  df-ss 3922  df-pss 3925  df-nul 4287  df-if 4488  df-pw 4564  df-sn 4590  df-pr 4592  df-op 4596  df-uni 4873  df-int 4913  df-iun 4958  df-br 5110  df-opab 5174  df-mpt 5193  df-tr 5219  df-id 5556  df-eprel 5561  df-po 5569  df-so 5570  df-fr 5614  df-se 5615  df-we 5616  df-xp 5667  df-rel 5668  df-cnv 5669  df-co 5670  df-dm 5671  df-rn 5672  df-res 5673  df-ima 5674  df-pred 6302  df-ord 6363  df-on 6364  df-lim 6365  df-suc 6366  df-iota 6492  df-fun 6538  df-fn 6539  df-f 6540  df-f1 6541  df-fo 6542  df-f1o 6543  df-fv 6544  df-isom 6545  df-riota 7367  df-ov 7413  df-oprab 7414  df-mpo 7415  df-om 7859  df-1st 7982  df-2nd 7983  df-frecs 8274  df-wrecs 8305  df-recs 8354  df-rdg 8393  df-1o 8449  df-oadd 8453  df-omul 8454  df-er 8690  df-map 8822  df-en 8940  df-dom 8941  df-sdom 8942  df-fin 8943  df-sup 9398  df-inf 9399  df-oi 9468  df-card 9921  df-acn 9924  df-pnf 11240  df-mnf 11241  df-xr 11242  df-ltxr 11243  df-le 11244  df-sub 11438  df-neg 11439  df-div 11867  df-nn 12229  df-2 12298  df-3 12299  df-n0 12500  df-xnn0 12573  df-z 12587  df-uz 12858  df-q 12968  df-rp 13012  df-ico 13373  df-fz 13531  df-fl 13821  df-mod 13899  df-seq 14034  df-exp 14094  df-hash 14363  df-cj 15146  df-re 15147  df-im 15148  df-sqrt 15282  df-abs 15283  df-dvds 16306  df-gcd 16548  df-numer 16789  df-denom 16790  df-squarenn 43568  df-pell1qr 43569  df-pell14qr 43570  df-pell1234qr 43571  df-pellfund 43572

This theorem is referenced by:  pellfund14  43625  pellfund14b  43626