![]() |
Mathbox for Stefan O'Rear |
< Previous
Next >
Nearby theorems |
|
Mirrors > Home > MPE Home > Th. List > Mathboxes > pellfundgt1 | Structured version Visualization version GIF version |
Description: Weak lower bound on the Pell fundamental solution. (Contributed by Stefan O'Rear, 19-Sep-2014.) |
Ref | Expression |
---|---|
pellfundgt1 | ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 1 < (PellFund‘𝐷)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 1red 11115 | . 2 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 1 ∈ ℝ) | |
2 | eldifi 4085 | . . . . . . 7 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 𝐷 ∈ ℕ) | |
3 | 2 | peano2nnd 12129 | . . . . . 6 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (𝐷 + 1) ∈ ℕ) |
4 | 3 | nnrpd 12910 | . . . . 5 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (𝐷 + 1) ∈ ℝ+) |
5 | 4 | rpsqrtcld 15256 | . . . 4 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (√‘(𝐷 + 1)) ∈ ℝ+) |
6 | 5 | rpred 12912 | . . 3 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (√‘(𝐷 + 1)) ∈ ℝ) |
7 | 2 | nnrpd 12910 | . . . . 5 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 𝐷 ∈ ℝ+) |
8 | 7 | rpsqrtcld 15256 | . . . 4 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (√‘𝐷) ∈ ℝ+) |
9 | 8 | rpred 12912 | . . 3 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (√‘𝐷) ∈ ℝ) |
10 | 6, 9 | readdcld 11143 | . 2 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → ((√‘(𝐷 + 1)) + (√‘𝐷)) ∈ ℝ) |
11 | pellfundre 41107 | . 2 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (PellFund‘𝐷) ∈ ℝ) | |
12 | sqrt1 15116 | . . . . 5 ⊢ (√‘1) = 1 | |
13 | 12, 1 | eqeltrid 2843 | . . . 4 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (√‘1) ∈ ℝ) |
14 | 13, 13 | readdcld 11143 | . . 3 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → ((√‘1) + (√‘1)) ∈ ℝ) |
15 | 1lt2 12283 | . . . . 5 ⊢ 1 < 2 | |
16 | 12, 12 | oveq12i 7364 | . . . . . 6 ⊢ ((√‘1) + (√‘1)) = (1 + 1) |
17 | 1p1e2 12237 | . . . . . 6 ⊢ (1 + 1) = 2 | |
18 | 16, 17 | eqtri 2766 | . . . . 5 ⊢ ((√‘1) + (√‘1)) = 2 |
19 | 15, 18 | breqtrri 5131 | . . . 4 ⊢ 1 < ((√‘1) + (√‘1)) |
20 | 19 | a1i 11 | . . 3 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 1 < ((√‘1) + (√‘1))) |
21 | 3 | nnge1d 12160 | . . . . 5 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 1 ≤ (𝐷 + 1)) |
22 | 0le1 11637 | . . . . . . 7 ⊢ 0 ≤ 1 | |
23 | 22 | a1i 11 | . . . . . 6 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 0 ≤ 1) |
24 | 2 | nnred 12127 | . . . . . . 7 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 𝐷 ∈ ℝ) |
25 | peano2re 11287 | . . . . . . 7 ⊢ (𝐷 ∈ ℝ → (𝐷 + 1) ∈ ℝ) | |
26 | 24, 25 | syl 17 | . . . . . 6 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (𝐷 + 1) ∈ ℝ) |
27 | 3 | nnnn0d 12432 | . . . . . . 7 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (𝐷 + 1) ∈ ℕ0) |
28 | 27 | nn0ge0d 12435 | . . . . . 6 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 0 ≤ (𝐷 + 1)) |
29 | 1, 23, 26, 28 | sqrtled 15271 | . . . . 5 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (1 ≤ (𝐷 + 1) ↔ (√‘1) ≤ (√‘(𝐷 + 1)))) |
30 | 21, 29 | mpbid 231 | . . . 4 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (√‘1) ≤ (√‘(𝐷 + 1))) |
31 | 2 | nnge1d 12160 | . . . . 5 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 1 ≤ 𝐷) |
32 | 2 | nnnn0d 12432 | . . . . . . 7 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 𝐷 ∈ ℕ0) |
33 | 32 | nn0ge0d 12435 | . . . . . 6 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 0 ≤ 𝐷) |
34 | 1, 23, 24, 33 | sqrtled 15271 | . . . . 5 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (1 ≤ 𝐷 ↔ (√‘1) ≤ (√‘𝐷))) |
35 | 31, 34 | mpbid 231 | . . . 4 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (√‘1) ≤ (√‘𝐷)) |
36 | 13, 13, 6, 9, 30, 35 | le2addd 11733 | . . 3 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → ((√‘1) + (√‘1)) ≤ ((√‘(𝐷 + 1)) + (√‘𝐷))) |
37 | 1, 14, 10, 20, 36 | ltletrd 11274 | . 2 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 1 < ((√‘(𝐷 + 1)) + (√‘𝐷))) |
38 | pellfundge 41108 | . 2 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → ((√‘(𝐷 + 1)) + (√‘𝐷)) ≤ (PellFund‘𝐷)) | |
39 | 1, 10, 11, 37, 38 | ltletrd 11274 | 1 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 1 < (PellFund‘𝐷)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∈ wcel 2107 ∖ cdif 3906 class class class wbr 5104 ‘cfv 6494 (class class class)co 7352 ℝcr 11009 0cc0 11010 1c1 11011 + caddc 11013 < clt 11148 ≤ cle 11149 ℕcn 12112 2c2 12167 √csqrt 15078 ◻NNcsquarenn 41062 PellFundcpellfund 41066 |
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 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2709 ax-rep 5241 ax-sep 5255 ax-nul 5262 ax-pow 5319 ax-pr 5383 ax-un 7665 ax-inf2 9536 ax-cnex 11066 ax-resscn 11067 ax-1cn 11068 ax-icn 11069 ax-addcl 11070 ax-addrcl 11071 ax-mulcl 11072 ax-mulrcl 11073 ax-mulcom 11074 ax-addass 11075 ax-mulass 11076 ax-distr 11077 ax-i2m1 11078 ax-1ne0 11079 ax-1rid 11080 ax-rnegex 11081 ax-rrecex 11082 ax-cnre 11083 ax-pre-lttri 11084 ax-pre-lttrn 11085 ax-pre-ltadd 11086 ax-pre-mulgt0 11087 ax-pre-sup 11088 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3064 df-rex 3073 df-rmo 3352 df-reu 3353 df-rab 3407 df-v 3446 df-sbc 3739 df-csb 3855 df-dif 3912 df-un 3914 df-in 3916 df-ss 3926 df-pss 3928 df-nul 4282 df-if 4486 df-pw 4561 df-sn 4586 df-pr 4588 df-op 4592 df-uni 4865 df-int 4907 df-iun 4955 df-br 5105 df-opab 5167 df-mpt 5188 df-tr 5222 df-id 5530 df-eprel 5536 df-po 5544 df-so 5545 df-fr 5587 df-se 5588 df-we 5589 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-pred 6252 df-ord 6319 df-on 6320 df-lim 6321 df-suc 6322 df-iota 6446 df-fun 6496 df-fn 6497 df-f 6498 df-f1 6499 df-fo 6500 df-f1o 6501 df-fv 6502 df-isom 6503 df-riota 7308 df-ov 7355 df-oprab 7356 df-mpo 7357 df-om 7796 df-1st 7914 df-2nd 7915 df-frecs 8205 df-wrecs 8236 df-recs 8310 df-rdg 8349 df-1o 8405 df-oadd 8409 df-omul 8410 df-er 8607 df-map 8726 df-en 8843 df-dom 8844 df-sdom 8845 df-fin 8846 df-sup 9337 df-inf 9338 df-oi 9405 df-card 9834 df-acn 9837 df-pnf 11150 df-mnf 11151 df-xr 11152 df-ltxr 11153 df-le 11154 df-sub 11346 df-neg 11347 df-div 11772 df-nn 12113 df-2 12175 df-3 12176 df-n0 12373 df-xnn0 12445 df-z 12459 df-uz 12723 df-q 12829 df-rp 12871 df-ico 13225 df-fz 13380 df-fl 13652 df-mod 13730 df-seq 13862 df-exp 13923 df-hash 14185 df-cj 14944 df-re 14945 df-im 14946 df-sqrt 15080 df-abs 15081 df-dvds 16097 df-gcd 16335 df-numer 16570 df-denom 16571 df-squarenn 41067 df-pell1qr 41068 df-pell14qr 41069 df-pell1234qr 41070 df-pellfund 41071 |
This theorem is referenced by: pellfundex 41112 pellfundrp 41114 pellfundne1 41115 pellfund14 41124 |
Copyright terms: Public domain | W3C validator |