Theorem pellfundex 40624

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 40614. (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 11977	. . . 4 ⊢ 2 ∈ ℝ
2		pellfundre 40619	. . . 4 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (PellFund‘𝐷) ∈ ℝ)
3		remulcl 10887	. . . 4 ⊢ ((2 ∈ ℝ ∧ (PellFund‘𝐷) ∈ ℝ) → (2 · (PellFund‘𝐷)) ∈ ℝ)
4	1, 2, 3	sylancr 586	. . 3 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (2 · (PellFund‘𝐷)) ∈ ℝ)
5		0red 10909	. . . . . . 7 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 0 ∈ ℝ)
6		1red 10907	. . . . . . 7 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 1 ∈ ℝ)
7		0lt1 11427	. . . . . . . 8 ⊢ 0 < 1
8	7	a1i 11	. . . . . . 7 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 0 < 1)
9		pellfundgt1 40621	. . . . . . 7 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 1 < (PellFund‘𝐷))
10	5, 6, 2, 8, 9	lttrd 11066	. . . . . 6 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 0 < (PellFund‘𝐷))
11	2, 10	elrpd 12698	. . . . 5 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (PellFund‘𝐷) ∈ ℝ+)
12	2, 11	ltaddrpd 12734	. . . 4 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (PellFund‘𝐷) < ((PellFund‘𝐷) + (PellFund‘𝐷)))
13	2	recnd 10934	. . . . 5 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (PellFund‘𝐷) ∈ ℂ)
14	13	2timesd 12146	. . . 4 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (2 · (PellFund‘𝐷)) = ((PellFund‘𝐷) + (PellFund‘𝐷)))
15	12, 14	breqtrrd 5098	. . 3 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (PellFund‘𝐷) < (2 · (PellFund‘𝐷)))
16		pellfundglb 40623	. . 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 1461	. 2 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → ∃𝑎 ∈ (Pell1QR‘𝐷)((PellFund‘𝐷) ≤ 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷))))
18	2	adantr 480	. . . . . 6 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → (PellFund‘𝐷) ∈ ℝ)
19		pell1qrss14 40606	. . . . . . . 8 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (Pell1QR‘𝐷) ⊆ (Pell14QR‘𝐷))
20	19	sselda 3917	. . . . . . 7 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → 𝑎 ∈ (Pell14QR‘𝐷))
21		pell14qrre 40595	. . . . . . 7 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell14QR‘𝐷)) → 𝑎 ∈ ℝ)
22	20, 21	syldan 590	. . . . . 6 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → 𝑎 ∈ ℝ)
23	18, 22	leloed 11048	. . . . 5 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → ((PellFund‘𝐷) ≤ 𝑎 ↔ ((PellFund‘𝐷) < 𝑎 ∨ (PellFund‘𝐷) = 𝑎)))
24		simp-4l 779	. . . . . . . . 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 780	. . . . . . . . 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 765	. . . . . . . . 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 769	. . . . . . . . 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 726	. . . . . . . . . 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 728	. . . . . . . . . 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 728	. . . . . . . . . . . . 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 3918	. . . . . . . . . . . 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 40595	. . . . . . . . . . . 12 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑏 ∈ (Pell14QR‘𝐷)) → 𝑏 ∈ ℝ)
33	24, 31, 32	syl2anc 583	. . . . . . . . . . 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 10887	. . . . . . . . . . 11 ⊢ ((2 ∈ ℝ ∧ 𝑏 ∈ ℝ) → (2 · 𝑏) ∈ ℝ)
35	1, 33, 34	sylancr 586	. . . . . . . . . 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 769	. . . . . . . . . . 11 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷)))) → 𝑎 < (2 · (PellFund‘𝐷)))
37	36	ad2antrr 722	. . . . . . . . . 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 767	. . . . . . . . . . 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 728	. . . . . . . . . . . 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 12006	. . . . . . . . . . . . 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 11758	. . . . . . . . . . . 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 1372	. . . . . . . . . . 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 231	. . . . . . . . . 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 11065	. . . . . . . . 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 1134	. . . . . . . . . 10 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → 𝐷 ∈ (ℕ ∖ ◻NN))
48	19	3ad2ant1 1131	. . . . . . . . . . . 12 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → (Pell1QR‘𝐷) ⊆ (Pell14QR‘𝐷))
49		simp2l 1197	. . . . . . . . . . . 12 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → 𝑎 ∈ (Pell1QR‘𝐷))
50	48, 49	sseldd 3918	. . . . . . . . . . 11 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → 𝑎 ∈ (Pell14QR‘𝐷))
51		simp2r 1198	. . . . . . . . . . . 12 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → 𝑏 ∈ (Pell1QR‘𝐷))
52	48, 51	sseldd 3918	. . . . . . . . . . 11 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → 𝑏 ∈ (Pell14QR‘𝐷))
53		pell14qrdivcl 40603	. . . . . . . . . . 11 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell14QR‘𝐷) ∧ 𝑏 ∈ (Pell14QR‘𝐷)) → (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷))
54	47, 50, 52, 53	syl3anc 1369	. . . . . . . . . 10 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷))
55	47, 52, 32	syl2anc 583	. . . . . . . . . . . . . 14 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → 𝑏 ∈ ℝ)
56	55	recnd 10934	. . . . . . . . . . . . 13 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → 𝑏 ∈ ℂ)
57	56	mulid2d 10924	. . . . . . . . . . . 12 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → (1 · 𝑏) = 𝑏)
58		simp3l 1199	. . . . . . . . . . . 12 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → 𝑏 < 𝑎)
59	57, 58	eqbrtrd 5092	. . . . . . . . . . 11 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → (1 · 𝑏) < 𝑎)
60		1red 10907	. . . . . . . . . . . 12 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → 1 ∈ ℝ)
61	47, 50, 21	syl2anc 583	. . . . . . . . . . . 12 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → 𝑎 ∈ ℝ)
62		pell14qrgt0 40597	. . . . . . . . . . . . 13 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑏 ∈ (Pell14QR‘𝐷)) → 0 < 𝑏)
63	47, 52, 62	syl2anc 583	. . . . . . . . . . . 12 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → 0 < 𝑏)
64		ltmuldiv 11778	. . . . . . . . . . . 12 ⊢ ((1 ∈ ℝ ∧ 𝑎 ∈ ℝ ∧ (𝑏 ∈ ℝ ∧ 0 < 𝑏)) → ((1 · 𝑏) < 𝑎 ↔ 1 < (𝑎 / 𝑏)))
65	60, 61, 55, 63, 64	syl112anc 1372	. . . . . . . . . . 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 231	. . . . . . . . . 10 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → 1 < (𝑎 / 𝑏))
67		simp3r 1200	. . . . . . . . . . 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 11782	. . . . . . . . . . . 12 ⊢ ((𝑎 ∈ ℝ ∧ 2 ∈ ℝ ∧ (𝑏 ∈ ℝ ∧ 0 < 𝑏)) → ((𝑎 / 𝑏) < 2 ↔ 𝑎 < (2 · 𝑏)))
70	61, 68, 55, 63, 69	syl112anc 1372	. . . . . . . . . . 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 256	. . . . . . . . . 10 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 ∈ (Pell1QR‘𝐷) ∧ 𝑏 ∈ (Pell1QR‘𝐷)) ∧ (𝑏 < 𝑎 ∧ 𝑎 < (2 · 𝑏))) → (𝑎 / 𝑏) < 2)
72		simprr 769	. . . . . . . . . . 11 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) ∧ (1 < (𝑎 / 𝑏) ∧ (𝑎 / 𝑏) < 2)) → (𝑎 / 𝑏) < 2)
73		simpll 763	. . . . . . . . . . . . 13 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) ∧ (1 < (𝑎 / 𝑏) ∧ (𝑎 / 𝑏) < 2)) → 𝐷 ∈ (ℕ ∖ ◻NN))
74		simplr 765	. . . . . . . . . . . . 13 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) ∧ (1 < (𝑎 / 𝑏) ∧ (𝑎 / 𝑏) < 2)) → (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷))
75		simprl 767	. . . . . . . . . . . . 13 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) ∧ (1 < (𝑎 / 𝑏) ∧ (𝑎 / 𝑏) < 2)) → 1 < (𝑎 / 𝑏))
76		pell14qrgapw 40614	. . . . . . . . . . . . 13 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷) ∧ 1 < (𝑎 / 𝑏)) → 2 < (𝑎 / 𝑏))
77	73, 74, 75, 76	syl3anc 1369	. . . . . . . . . . . 12 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) ∧ (1 < (𝑎 / 𝑏) ∧ (𝑎 / 𝑏) < 2)) → 2 < (𝑎 / 𝑏))
78		pell14qrre 40595	. . . . . . . . . . . . . 14 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) → (𝑎 / 𝑏) ∈ ℝ)
79	78	adantr 480	. . . . . . . . . . . . 13 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) ∧ (1 < (𝑎 / 𝑏) ∧ (𝑎 / 𝑏) < 2)) → (𝑎 / 𝑏) ∈ ℝ)
80		ltnsym 11003	. . . . . . . . . . . . 13 ⊢ ((2 ∈ ℝ ∧ (𝑎 / 𝑏) ∈ ℝ) → (2 < (𝑎 / 𝑏) → ¬ (𝑎 / 𝑏) < 2))
81	1, 79, 80	sylancr 586	. . . . . . . . . . . 12 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) ∧ (1 < (𝑎 / 𝑏) ∧ (𝑎 / 𝑏) < 2)) → (2 < (𝑎 / 𝑏) → ¬ (𝑎 / 𝑏) < 2))
82	77, 81	mpd 15	. . . . . . . . . . 11 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ (𝑎 / 𝑏) ∈ (Pell14QR‘𝐷)) ∧ (1 < (𝑎 / 𝑏) ∧ (𝑎 / 𝑏) < 2)) → ¬ (𝑎 / 𝑏) < 2)
83	72, 82	pm2.21dd 194	. . . . . . . . . 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 835	. . . . . . . . 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 1377	. . . . . . . 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 763	. . . . . . . . 9 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷)))) → 𝐷 ∈ (ℕ ∖ ◻NN))
87	22	adantr 480	. . . . . . . . 9 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷)))) → 𝑎 ∈ ℝ)
88		simprl 767	. . . . . . . . 9 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷)))) → (PellFund‘𝐷) < 𝑎)
89		pellfundglb 40623	. . . . . . . . 9 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ ℝ ∧ (PellFund‘𝐷) < 𝑎) → ∃𝑏 ∈ (Pell1QR‘𝐷)((PellFund‘𝐷) ≤ 𝑏 ∧ 𝑏 < 𝑎))
90	86, 87, 88, 89	syl3anc 1369	. . . . . . . 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 3217	. . . . . . 7 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ ((PellFund‘𝐷) < 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷)))) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))
92	91	exp32 420	. . . . . 6 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → ((PellFund‘𝐷) < 𝑎 → (𝑎 < (2 · (PellFund‘𝐷)) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))))
93		simp2 1135	. . . . . . . 8 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ (PellFund‘𝐷) = 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷))) → (PellFund‘𝐷) = 𝑎)
94		simp1r 1196	. . . . . . . 8 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ (PellFund‘𝐷) = 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷))) → 𝑎 ∈ (Pell1QR‘𝐷))
95	93, 94	eqeltrd 2839	. . . . . . 7 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) ∧ (PellFund‘𝐷) = 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷))) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))
96	95	3exp 1117	. . . . . 6 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → ((PellFund‘𝐷) = 𝑎 → (𝑎 < (2 · (PellFund‘𝐷)) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))))
97	92, 96	jaod 855	. . . . 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 239	. . . 4 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → ((PellFund‘𝐷) ≤ 𝑎 → (𝑎 < (2 · (PellFund‘𝐷)) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))))
99	98	impd 410	. . 3 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝑎 ∈ (Pell1QR‘𝐷)) → (((PellFund‘𝐷) ≤ 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷))) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷)))
100	99	rexlimdva 3212	. 2 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (∃𝑎 ∈ (Pell1QR‘𝐷)((PellFund‘𝐷) ≤ 𝑎 ∧ 𝑎 < (2 · (PellFund‘𝐷))) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷)))
101	17, 100	mpd 15	1 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (PellFund‘𝐷) ∈ (Pell1QR‘𝐷))

Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 205   ∧ wa 395   ∨ wo 843   ∧ w3a 1085   = wceq 1539   ∈ wcel 2108  ∃wrex 3064   ∖ cdif 3880   ⊆ wss 3883   class class class wbr 5070  ‘cfv 6418  (class class class)co 7255  ℝcr 10801  0cc0 10802  1c1 10803   + caddc 10805   · cmul 10807   < clt 10940   ≤ cle 10941   / cdiv 11562  ℕcn 11903  2c2 11958  ◻_NNcsquarenn 40574  Pell1QRcpell1qr 40575  Pell14QRcpell14qr 40577  PellFundcpellfund 40578

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1799  ax-4 1813  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2110  ax-9 2118  ax-10 2139  ax-11 2156  ax-12 2173  ax-ext 2709  ax-rep 5205  ax-sep 5218  ax-nul 5225  ax-pow 5283  ax-pr 5347  ax-un 7566  ax-inf2 9329  ax-cnex 10858  ax-resscn 10859  ax-1cn 10860  ax-icn 10861  ax-addcl 10862  ax-addrcl 10863  ax-mulcl 10864  ax-mulrcl 10865  ax-mulcom 10866  ax-addass 10867  ax-mulass 10868  ax-distr 10869  ax-i2m1 10870  ax-1ne0 10871  ax-1rid 10872  ax-rnegex 10873  ax-rrecex 10874  ax-cnre 10875  ax-pre-lttri 10876  ax-pre-lttrn 10877  ax-pre-ltadd 10878  ax-pre-mulgt0 10879  ax-pre-sup 10880

This theorem depends on definitions:  df-bi 206  df-an 396  df-or 844  df-3or 1086  df-3an 1087  df-tru 1542  df-fal 1552  df-ex 1784  df-nf 1788  df-sb 2069  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2817  df-nfc 2888  df-ne 2943  df-nel 3049  df-ral 3068  df-rex 3069  df-reu 3070  df-rmo 3071  df-rab 3072  df-v 3424  df-sbc 3712  df-csb 3829  df-dif 3886  df-un 3888  df-in 3890  df-ss 3900  df-pss 3902  df-nul 4254  df-if 4457  df-pw 4532  df-sn 4559  df-pr 4561  df-tp 4563  df-op 4565  df-uni 4837  df-int 4877  df-iun 4923  df-br 5071  df-opab 5133  df-mpt 5154  df-tr 5188  df-id 5480  df-eprel 5486  df-po 5494  df-so 5495  df-fr 5535  df-se 5536  df-we 5537  df-xp 5586  df-rel 5587  df-cnv 5588  df-co 5589  df-dm 5590  df-rn 5591  df-res 5592  df-ima 5593  df-pred 6191  df-ord 6254  df-on 6255  df-lim 6256  df-suc 6257  df-iota 6376  df-fun 6420  df-fn 6421  df-f 6422  df-f1 6423  df-fo 6424  df-f1o 6425  df-fv 6426  df-isom 6427  df-riota 7212  df-ov 7258  df-oprab 7259  df-mpo 7260  df-om 7688  df-1st 7804  df-2nd 7805  df-frecs 8068  df-wrecs 8099  df-recs 8173  df-rdg 8212  df-1o 8267  df-oadd 8271  df-omul 8272  df-er 8456  df-map 8575  df-en 8692  df-dom 8693  df-sdom 8694  df-fin 8695  df-sup 9131  df-inf 9132  df-oi 9199  df-card 9628  df-acn 9631  df-pnf 10942  df-mnf 10943  df-xr 10944  df-ltxr 10945  df-le 10946  df-sub 11137  df-neg 11138  df-div 11563  df-nn 11904  df-2 11966  df-3 11967  df-n0 12164  df-xnn0 12236  df-z 12250  df-uz 12512  df-q 12618  df-rp 12660  df-ico 13014  df-fz 13169  df-fl 13440  df-mod 13518  df-seq 13650  df-exp 13711  df-hash 13973  df-cj 14738  df-re 14739  df-im 14740  df-sqrt 14874  df-abs 14875  df-dvds 15892  df-gcd 16130  df-numer 16367  df-denom 16368  df-squarenn 40579  df-pell1qr 40580  df-pell14qr 40581  df-pell1234qr 40582  df-pellfund 40583

This theorem is referenced by:  pellfund14  40636  pellfund14b  40637