| Mathbox for Stefan O'Rear |
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| 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 11209 | . 2 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 1 ∈ ℝ) | |
| 2 | eldifi 4093 | . . . . . . 7 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 𝐷 ∈ ℕ) | |
| 3 | 2 | peano2nnd 12250 | . . . . . 6 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (𝐷 + 1) ∈ ℕ) |
| 4 | 3 | nnrpd 13058 | . . . . 5 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (𝐷 + 1) ∈ ℝ+) |
| 5 | 4 | rpsqrtcld 15463 | . . . 4 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (√‘(𝐷 + 1)) ∈ ℝ+) |
| 6 | 5 | rpred 13060 | . . 3 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (√‘(𝐷 + 1)) ∈ ℝ) |
| 7 | 2 | nnrpd 13058 | . . . . 5 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 𝐷 ∈ ℝ+) |
| 8 | 7 | rpsqrtcld 15463 | . . . 4 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (√‘𝐷) ∈ ℝ+) |
| 9 | 8 | rpred 13060 | . . 3 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (√‘𝐷) ∈ ℝ) |
| 10 | 6, 9 | readdcld 11238 | . 2 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → ((√‘(𝐷 + 1)) + (√‘𝐷)) ∈ ℝ) |
| 11 | pellfundre 43534 | . 2 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (PellFund‘𝐷) ∈ ℝ) | |
| 12 | sqrt1 15322 | . . . . 5 ⊢ (√‘1) = 1 | |
| 13 | 12, 1 | eqeltrid 2873 | . . . 4 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (√‘1) ∈ ℝ) |
| 14 | 13, 13 | readdcld 11238 | . . 3 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → ((√‘1) + (√‘1)) ∈ ℝ) |
| 15 | 1lt2 12413 | . . . . 5 ⊢ 1 < 2 | |
| 16 | 12, 12 | oveq12i 7423 | . . . . . 6 ⊢ ((√‘1) + (√‘1)) = (1 + 1) |
| 17 | 1p1e2 12364 | . . . . . 6 ⊢ (1 + 1) = 2 | |
| 18 | 16, 17 | eqtri 2792 | . . . . 5 ⊢ ((√‘1) + (√‘1)) = 2 |
| 19 | 15, 18 | breqtrri 5142 | . . . 4 ⊢ 1 < ((√‘1) + (√‘1)) |
| 20 | 19 | a1i 11 | . . 3 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 1 < ((√‘1) + (√‘1))) |
| 21 | 3 | nnge1d 12284 | . . . . 5 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 1 ≤ (𝐷 + 1)) |
| 22 | 0le1 11737 | . . . . . . 7 ⊢ 0 ≤ 1 | |
| 23 | 22 | a1i 11 | . . . . . 6 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 0 ≤ 1) |
| 24 | 2 | nnred 12248 | . . . . . . 7 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 𝐷 ∈ ℝ) |
| 25 | peano2re 11383 | . . . . . . 7 ⊢ (𝐷 ∈ ℝ → (𝐷 + 1) ∈ ℝ) | |
| 26 | 24, 25 | syl 18 | . . . . . 6 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (𝐷 + 1) ∈ ℝ) |
| 27 | 3 | nnnn0d 12565 | . . . . . . 7 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (𝐷 + 1) ∈ ℕ0) |
| 28 | 27 | nn0ge0d 12568 | . . . . . 6 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 0 ≤ (𝐷 + 1)) |
| 29 | 1, 23, 26, 28 | sqrtled 15478 | . . . . 5 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (1 ≤ (𝐷 + 1) ↔ (√‘1) ≤ (√‘(𝐷 + 1)))) |
| 30 | 21, 29 | mpbid 235 | . . . 4 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (√‘1) ≤ (√‘(𝐷 + 1))) |
| 31 | 2 | nnge1d 12284 | . . . . 5 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 1 ≤ 𝐷) |
| 32 | 2 | nnnn0d 12565 | . . . . . . 7 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 𝐷 ∈ ℕ0) |
| 33 | 32 | nn0ge0d 12568 | . . . . . 6 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 0 ≤ 𝐷) |
| 34 | 1, 23, 24, 33 | sqrtled 15478 | . . . . 5 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (1 ≤ 𝐷 ↔ (√‘1) ≤ (√‘𝐷))) |
| 35 | 31, 34 | mpbid 235 | . . . 4 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (√‘1) ≤ (√‘𝐷)) |
| 36 | 13, 13, 6, 9, 30, 35 | le2addd 11833 | . . 3 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → ((√‘1) + (√‘1)) ≤ ((√‘(𝐷 + 1)) + (√‘𝐷))) |
| 37 | 1, 14, 10, 20, 36 | ltletrd 11370 | . 2 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 1 < ((√‘(𝐷 + 1)) + (√‘𝐷))) |
| 38 | pellfundge 43535 | . 2 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → ((√‘(𝐷 + 1)) + (√‘𝐷)) ≤ (PellFund‘𝐷)) | |
| 39 | 1, 10, 11, 37, 38 | ltletrd 11370 | 1 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 1 < (PellFund‘𝐷)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2149 ∖ cdif 3910 class class class wbr 5113 ‘cfv 6537 (class class class)co 7411 ℝcr 11099 0cc0 11100 1c1 11101 + caddc 11103 < clt 11243 ≤ cle 11244 ℕcn 12233 2c2 12295 √csqrt 15284 ◻NNcsquarenn 43489 PellFundcpellfund 43493 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-rep 5242 ax-sep 5261 ax-nul 5271 ax-pow 5337 ax-pr 5405 ax-un 7733 ax-inf2 9610 ax-cnex 11156 ax-resscn 11157 ax-1cn 11158 ax-icn 11159 ax-addcl 11160 ax-addrcl 11161 ax-mulcl 11162 ax-mulrcl 11163 ax-mulcom 11164 ax-addass 11165 ax-mulass 11166 ax-distr 11167 ax-i2m1 11168 ax-1ne0 11169 ax-1rid 11170 ax-rnegex 11171 ax-rrecex 11172 ax-cnre 11173 ax-pre-lttri 11174 ax-pre-lttrn 11175 ax-pre-ltadd 11176 ax-pre-mulgt0 11177 ax-pre-sup 11178 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-nel 3071 df-ral 3086 df-rex 3096 df-rmo 3376 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-int 4917 df-iun 4962 df-br 5114 df-opab 5178 df-mpt 5197 df-tr 5223 df-id 5557 df-eprel 5562 df-po 5570 df-so 5571 df-fr 5615 df-se 5616 df-we 5617 df-xp 5668 df-rel 5669 df-cnv 5670 df-co 5671 df-dm 5672 df-rn 5673 df-res 5674 df-ima 5675 df-pred 6303 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-isom 6546 df-riota 7368 df-ov 7414 df-oprab 7415 df-mpo 7416 df-om 7863 df-1st 7986 df-2nd 7987 df-frecs 8278 df-wrecs 8309 df-recs 8358 df-rdg 8397 df-1o 8453 df-oadd 8457 df-omul 8458 df-er 8694 df-map 8826 df-en 8944 df-dom 8945 df-sdom 8946 df-fin 8947 df-sup 9402 df-inf 9403 df-oi 9472 df-card 9925 df-acn 9928 df-pnf 11245 df-mnf 11246 df-xr 11247 df-ltxr 11248 df-le 11249 df-sub 11443 df-neg 11444 df-div 11872 df-nn 12234 df-2 12303 df-3 12304 df-n0 12505 df-xnn0 12578 df-z 12592 df-uz 12863 df-q 12973 df-rp 13017 df-ico 13378 df-fz 13536 df-fl 13825 df-mod 13903 df-seq 14038 df-exp 14098 df-hash 14367 df-cj 15150 df-re 15151 df-im 15152 df-sqrt 15286 df-abs 15287 df-dvds 16311 df-gcd 16553 df-numer 16794 df-denom 16795 df-squarenn 43494 df-pell1qr 43495 df-pell14qr 43496 df-pell1234qr 43497 df-pellfund 43498 |
| This theorem is referenced by: pellfundex 43539 pellfundrp 43541 pellfundne1 43542 pellfund14 43551 |
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