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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 42828 | . . . . . 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 480 | . . . . 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 4090 | . . . . . . . . . . 11 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → 𝐷 ∈ ℕ) | |
| 4 | 3 | ad4antr 732 | . . . . . . . . . 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 768 | . . . . . . . . . 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 783 | . . . . . . . . . . 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 770 | . . . . . . . . . . 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 5128 | . . . . . . . . . 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 772 | . . . . . . . . . 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 42854 | . . . . . . . . . 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 838 | . . . . . . . . 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 5130 | . . . . . . . 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 412 | . . . . . . 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 3192 | . . . . . 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 453 | . . . . 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 240 | . . . 4 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 1 < 𝐴) → (𝐴 ∈ (Pell1QR‘𝐷) → ((√‘(𝐷 + 1)) + (√‘𝐷)) ≤ 𝐴)) |
| 17 | 16 | ex 412 | . . 3 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (1 < 𝐴 → (𝐴 ∈ (Pell1QR‘𝐷) → ((√‘(𝐷 + 1)) + (√‘𝐷)) ≤ 𝐴))) |
| 18 | 17 | com23 86 | . 2 ⊢ (𝐷 ∈ (ℕ ∖ ◻NN) → (𝐴 ∈ (Pell1QR‘𝐷) → (1 < 𝐴 → ((√‘(𝐷 + 1)) + (√‘𝐷)) ≤ 𝐴))) |
| 19 | 18 | 3imp 1110 | 1 ⊢ ((𝐷 ∈ (ℕ ∖ ◻NN) ∧ 𝐴 ∈ (Pell1QR‘𝐷) ∧ 1 < 𝐴) → ((√‘(𝐷 + 1)) + (√‘𝐷)) ≤ 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 ∧ w3a 1086 = wceq 1540 ∈ wcel 2109 ∃wrex 3053 ∖ cdif 3908 class class class wbr 5102 ‘cfv 6499 (class class class)co 7369 ℝcr 11043 1c1 11045 + caddc 11047 · cmul 11049 < clt 11184 ≤ cle 11185 − cmin 11381 ℕcn 12162 2c2 12217 ℕ0cn0 12418 ↑cexp 14002 √csqrt 15175 ◻NNcsquarenn 42817 Pell1QRcpell1qr 42818 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-sep 5246 ax-nul 5256 ax-pow 5315 ax-pr 5382 ax-un 7691 ax-cnex 11100 ax-resscn 11101 ax-1cn 11102 ax-icn 11103 ax-addcl 11104 ax-addrcl 11105 ax-mulcl 11106 ax-mulrcl 11107 ax-mulcom 11108 ax-addass 11109 ax-mulass 11110 ax-distr 11111 ax-i2m1 11112 ax-1ne0 11113 ax-1rid 11114 ax-rnegex 11115 ax-rrecex 11116 ax-cnre 11117 ax-pre-lttri 11118 ax-pre-lttrn 11119 ax-pre-ltadd 11120 ax-pre-mulgt0 11121 ax-pre-sup 11122 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-nel 3030 df-ral 3045 df-rex 3054 df-rmo 3351 df-reu 3352 df-rab 3403 df-v 3446 df-sbc 3751 df-csb 3860 df-dif 3914 df-un 3916 df-in 3918 df-ss 3928 df-pss 3931 df-nul 4293 df-if 4485 df-pw 4561 df-sn 4586 df-pr 4588 df-op 4592 df-uni 4868 df-iun 4953 df-br 5103 df-opab 5165 df-mpt 5184 df-tr 5210 df-id 5526 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-we 5586 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-pred 6262 df-ord 6323 df-on 6324 df-lim 6325 df-suc 6326 df-iota 6452 df-fun 6501 df-fn 6502 df-f 6503 df-f1 6504 df-fo 6505 df-f1o 6506 df-fv 6507 df-riota 7326 df-ov 7372 df-oprab 7373 df-mpo 7374 df-om 7823 df-2nd 7948 df-frecs 8237 df-wrecs 8268 df-recs 8317 df-rdg 8355 df-er 8648 df-en 8896 df-dom 8897 df-sdom 8898 df-sup 9369 df-pnf 11186 df-mnf 11187 df-xr 11188 df-ltxr 11189 df-le 11190 df-sub 11383 df-neg 11384 df-div 11812 df-nn 12163 df-2 12225 df-3 12226 df-n0 12419 df-z 12506 df-uz 12770 df-rp 12928 df-seq 13943 df-exp 14003 df-cj 15041 df-re 15042 df-im 15043 df-sqrt 15177 df-abs 15178 df-pell1qr 42823 |
| This theorem is referenced by: pell14qrgap 42856 |
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