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| Mirrors > Home > MPE Home > Th. List > Mathboxes > pell1qrgap | Structured version Visualization version GIF version | ||
| Description: First-quadrant Pell solutions are bounded away from 1. (This particular bound allows to prove exact values for the fundamental solution later.) (Contributed by Stefan O'Rear, 18-Sep-2014.) |
| Ref | Expression |
|---|---|
| pell1qrgap | ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝐴 ∈ (Pell1QR‘𝐷) ∧ 1 < 𝐴) → ((√‘(𝐷 + 1)) + (√‘𝐷)) ≤ 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elpell1qr 43997 | . . . . . 6 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (𝐴 ∈ (Pell1QR‘𝐷) ↔ (𝐴 ∈ ℝ ∧ ∃𝑎 ∈ ℕ0 ∃𝑏 ∈ ℕ0 (𝐴 = (𝑎 + ((√‘𝐷) · 𝑏)) ∧ ((𝑎↑2) − (𝐷 · (𝑏↑2))) = 1)))) | |
| 2 | 1 | adantr 486 | . . . . 5 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 1 < 𝐴) → (𝐴 ∈ (Pell1QR‘𝐷) ↔ (𝐴 ∈ ℝ ∧ ∃𝑎 ∈ ℕ0 ∃𝑏 ∈ ℕ0 (𝐴 = (𝑎 + ((√‘𝐷) · 𝑏)) ∧ ((𝑎↑2) − (𝐷 · (𝑏↑2))) = 1)))) |
| 3 | eldifi 4070 | . . . . . . . . . . 11 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 𝐷 ∈ ℕ) | |
| 4 | 3 | ad4antr 745 | . . . . . . . . . 10 ⊢ (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 1 < 𝐴) ∧ 𝐴 ∈ ℝ) ∧ (𝑎 ∈ ℕ0 ∧ 𝑏 ∈ ℕ0)) ∧ (𝐴 = (𝑎 + ((√‘𝐷) · 𝑏)) ∧ ((𝑎↑2) − (𝐷 · (𝑏↑2))) = 1)) → 𝐷 ∈ ℕ) |
| 5 | simplr 781 | . . . . . . . . . 10 ⊢ (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 1 < 𝐴) ∧ 𝐴 ∈ ℝ) ∧ (𝑎 ∈ ℕ0 ∧ 𝑏 ∈ ℕ0)) ∧ (𝐴 = (𝑎 + ((√‘𝐷) · 𝑏)) ∧ ((𝑎↑2) − (𝐷 · (𝑏↑2))) = 1)) → (𝑎 ∈ ℕ0 ∧ 𝑏 ∈ ℕ0)) | |
| 6 | simp-4r 796 | . . . . . . . . . . 11 ⊢ (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 1 < 𝐴) ∧ 𝐴 ∈ ℝ) ∧ (𝑎 ∈ ℕ0 ∧ 𝑏 ∈ ℕ0)) ∧ (𝐴 = (𝑎 + ((√‘𝐷) · 𝑏)) ∧ ((𝑎↑2) − (𝐷 · (𝑏↑2))) = 1)) → 1 < 𝐴) | |
| 7 | simprl 783 | . . . . . . . . . . 11 ⊢ (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 1 < 𝐴) ∧ 𝐴 ∈ ℝ) ∧ (𝑎 ∈ ℕ0 ∧ 𝑏 ∈ ℕ0)) ∧ (𝐴 = (𝑎 + ((√‘𝐷) · 𝑏)) ∧ ((𝑎↑2) − (𝐷 · (𝑏↑2))) = 1)) → 𝐴 = (𝑎 + ((√‘𝐷) · 𝑏))) | |
| 8 | 6, 7 | breqtrd 5134 | . . . . . . . . . 10 ⊢ (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 1 < 𝐴) ∧ 𝐴 ∈ ℝ) ∧ (𝑎 ∈ ℕ0 ∧ 𝑏 ∈ ℕ0)) ∧ (𝐴 = (𝑎 + ((√‘𝐷) · 𝑏)) ∧ ((𝑎↑2) − (𝐷 · (𝑏↑2))) = 1)) → 1 < (𝑎 + ((√‘𝐷) · 𝑏))) |
| 9 | simprr 785 | . . . . . . . . . 10 ⊢ (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 1 < 𝐴) ∧ 𝐴 ∈ ℝ) ∧ (𝑎 ∈ ℕ0 ∧ 𝑏 ∈ ℕ0)) ∧ (𝐴 = (𝑎 + ((√‘𝐷) · 𝑏)) ∧ ((𝑎↑2) − (𝐷 · (𝑏↑2))) = 1)) → ((𝑎↑2) − (𝐷 · (𝑏↑2))) = 1) | |
| 10 | pell1qrgaplem 44023 | . . . . . . . . . 10 ⊢ (((𝐷 ∈ ℕ ∧ (𝑎 ∈ ℕ0 ∧ 𝑏 ∈ ℕ0)) ∧ (1 < (𝑎 + ((√‘𝐷) · 𝑏)) ∧ ((𝑎↑2) − (𝐷 · (𝑏↑2))) = 1)) → ((√‘(𝐷 + 1)) + (√‘𝐷)) ≤ (𝑎 + ((√‘𝐷) · 𝑏))) | |
| 11 | 4, 5, 8, 9, 10 | syl22anc 852 | . . . . . . . . 9 ⊢ (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 1 < 𝐴) ∧ 𝐴 ∈ ℝ) ∧ (𝑎 ∈ ℕ0 ∧ 𝑏 ∈ ℕ0)) ∧ (𝐴 = (𝑎 + ((√‘𝐷) · 𝑏)) ∧ ((𝑎↑2) − (𝐷 · (𝑏↑2))) = 1)) → ((√‘(𝐷 + 1)) + (√‘𝐷)) ≤ (𝑎 + ((√‘𝐷) · 𝑏))) |
| 12 | 11, 7 | breqtrrd 5136 | . . . . . . . 8 ⊢ (((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 1 < 𝐴) ∧ 𝐴 ∈ ℝ) ∧ (𝑎 ∈ ℕ0 ∧ 𝑏 ∈ ℕ0)) ∧ (𝐴 = (𝑎 + ((√‘𝐷) · 𝑏)) ∧ ((𝑎↑2) − (𝐷 · (𝑏↑2))) = 1)) → ((√‘(𝐷 + 1)) + (√‘𝐷)) ≤ 𝐴) |
| 13 | 12 | ex 418 | . . . . . . 7 ⊢ ((((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 1 < 𝐴) ∧ 𝐴 ∈ ℝ) ∧ (𝑎 ∈ ℕ0 ∧ 𝑏 ∈ ℕ0)) → ((𝐴 = (𝑎 + ((√‘𝐷) · 𝑏)) ∧ ((𝑎↑2) − (𝐷 · (𝑏↑2))) = 1) → ((√‘(𝐷 + 1)) + (√‘𝐷)) ≤ 𝐴)) |
| 14 | 13 | rexlimdvva 3223 | . . . . . 6 ⊢ (((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 1 < 𝐴) ∧ 𝐴 ∈ ℝ) → (∃𝑎 ∈ ℕ0 ∃𝑏 ∈ ℕ0 (𝐴 = (𝑎 + ((√‘𝐷) · 𝑏)) ∧ ((𝑎↑2) − (𝐷 · (𝑏↑2))) = 1) → ((√‘(𝐷 + 1)) + (√‘𝐷)) ≤ 𝐴)) |
| 15 | 14 | expimpd 459 | . . . . 5 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 1 < 𝐴) → ((𝐴 ∈ ℝ ∧ ∃𝑎 ∈ ℕ0 ∃𝑏 ∈ ℕ0 (𝐴 = (𝑎 + ((√‘𝐷) · 𝑏)) ∧ ((𝑎↑2) − (𝐷 · (𝑏↑2))) = 1)) → ((√‘(𝐷 + 1)) + (√‘𝐷)) ≤ 𝐴)) |
| 16 | 2, 15 | sylbid 243 | . . . 4 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 1 < 𝐴) → (𝐴 ∈ (Pell1QR‘𝐷) → ((√‘(𝐷 + 1)) + (√‘𝐷)) ≤ 𝐴)) |
| 17 | 16 | ex 418 | . . 3 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (1 < 𝐴 → (𝐴 ∈ (Pell1QR‘𝐷) → ((√‘(𝐷 + 1)) + (√‘𝐷)) ≤ 𝐴))) |
| 18 | 17 | com23 87 | . 2 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (𝐴 ∈ (Pell1QR‘𝐷) → (1 < 𝐴 → ((√‘(𝐷 + 1)) + (√‘𝐷)) ≤ 𝐴))) |
| 19 | 18 | 3imp 1128 | 1 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝐴 ∈ (Pell1QR‘𝐷) ∧ 1 < 𝐴) → ((√‘(𝐷 + 1)) + (√‘𝐷)) ≤ 𝐴) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 ∧ w3a 1103 = wceq 1569 ∈ wcel 2146 ∃wrex 3090 ∖ cdif 4048 class class class wbr 5106 ‘cfv 6547 (class class class)co 7430 ℝcr 11212 1c1 11214 + caddc 11216 · cmul 11218 < clt 11356 ≤ cle 11357 − cmin 11554 ℕcn 12348 2c2 12410 ℕ0cn0 12619 ↑cexp 14217 √csqrt 15415 ◻NNcsquarenn 43986 Pell1QRcpell1qr 43987 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1944 ax-6 2001 ax-7 2042 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2196 ax-12 2215 ax-ext 2735 ax-sep 5252 ax-nul 5263 ax-pow 5331 ax-pr 5395 ax-un 7761 ax-cnex 11269 ax-resscn 11270 ax-1cn 11271 ax-icn 11272 ax-addcl 11273 ax-addrcl 11274 ax-mulcl 11275 ax-mulrcl 11276 ax-mulcom 11277 ax-addass 11278 ax-mulass 11279 ax-distr 11280 ax-i2m1 11281 ax-1ne0 11282 ax-1rid 11283 ax-rnegex 11284 ax-rrecex 11285 ax-cnre 11286 ax-pre-lttri 11287 ax-pre-lttrn 11288 ax-pre-ltadd 11289 ax-pre-mulgt0 11290 ax-pre-sup 11291 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2101 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-iun 4956 df-br 5107 df-opab 5171 df-mpt 5190 df-tr 5216 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6311 df-ord 6372 df-on 6373 df-lim 6374 df-suc 6375 df-iota 6501 df-fun 6549 df-fn 6550 df-f 6551 df-f1 6552 df-fo 6553 df-f1o 6554 df-fv 6555 df-riota 7387 df-ov 7433 df-oprab 7434 df-mpo 7435 df-om 7888 df-2nd 8012 df-frecs 8313 df-wrecs 8344 df-recs 8393 df-rdg 8432 df-er 8731 df-en 8988 df-dom 8989 df-sdom 8990 df-sup 9447 df-pnf 11358 df-mnf 11359 df-xr 11360 df-ltxr 11361 df-le 11362 df-sub 11556 df-neg 11557 df-div 11987 df-nn 12349 df-2 12418 df-3 12419 df-n0 12620 df-z 12707 df-uz 12979 df-rp 13134 df-seq 14158 df-exp 14218 df-cj 15281 df-re 15282 df-im 15283 df-sqrt 15417 df-abs 15418 df-pell1qr 43992 |
| This theorem is used by: pell14qrgap 44025 |
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