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| Mirrors > Home > ILE Home > Th. List > nn0opthlem1d | GIF version | ||
| Description: A rather pretty lemma for nn0opth2 10976. (Contributed by Jim Kingdon, 31-Oct-2021.) |
| Ref | Expression |
|---|---|
| nn0opthlem1d.1 | ⊢ (𝜑 → 𝐴 ∈ ℕ0) |
| nn0opthlem1d.2 | ⊢ (𝜑 → 𝐶 ∈ ℕ0) |
| Ref | Expression |
|---|---|
| nn0opthlem1d | ⊢ (𝜑 → (𝐴 < 𝐶 ↔ ((𝐴 · 𝐴) + (2 · 𝐴)) < (𝐶 · 𝐶))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nn0opthlem1d.1 | . . . 4 ⊢ (𝜑 → 𝐴 ∈ ℕ0) | |
| 2 | 1nn0 9408 | . . . . 5 ⊢ 1 ∈ ℕ0 | |
| 3 | 2 | a1i 9 | . . . 4 ⊢ (𝜑 → 1 ∈ ℕ0) |
| 4 | 1, 3 | nn0addcld 9449 | . . 3 ⊢ (𝜑 → (𝐴 + 1) ∈ ℕ0) |
| 5 | nn0opthlem1d.2 | . . 3 ⊢ (𝜑 → 𝐶 ∈ ℕ0) | |
| 6 | 4, 5 | nn0le2msqd 10971 | . 2 ⊢ (𝜑 → ((𝐴 + 1) ≤ 𝐶 ↔ ((𝐴 + 1) · (𝐴 + 1)) ≤ (𝐶 · 𝐶))) |
| 7 | nn0ltp1le 9532 | . . 3 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝐶 ∈ ℕ0) → (𝐴 < 𝐶 ↔ (𝐴 + 1) ≤ 𝐶)) | |
| 8 | 1, 5, 7 | syl2anc 411 | . 2 ⊢ (𝜑 → (𝐴 < 𝐶 ↔ (𝐴 + 1) ≤ 𝐶)) |
| 9 | 1, 1 | nn0mulcld 9450 | . . . . 5 ⊢ (𝜑 → (𝐴 · 𝐴) ∈ ℕ0) |
| 10 | 2nn0 9409 | . . . . . . 7 ⊢ 2 ∈ ℕ0 | |
| 11 | 10 | a1i 9 | . . . . . 6 ⊢ (𝜑 → 2 ∈ ℕ0) |
| 12 | 11, 1 | nn0mulcld 9450 | . . . . 5 ⊢ (𝜑 → (2 · 𝐴) ∈ ℕ0) |
| 13 | 9, 12 | nn0addcld 9449 | . . . 4 ⊢ (𝜑 → ((𝐴 · 𝐴) + (2 · 𝐴)) ∈ ℕ0) |
| 14 | 5, 5 | nn0mulcld 9450 | . . . 4 ⊢ (𝜑 → (𝐶 · 𝐶) ∈ ℕ0) |
| 15 | nn0ltp1le 9532 | . . . 4 ⊢ ((((𝐴 · 𝐴) + (2 · 𝐴)) ∈ ℕ0 ∧ (𝐶 · 𝐶) ∈ ℕ0) → (((𝐴 · 𝐴) + (2 · 𝐴)) < (𝐶 · 𝐶) ↔ (((𝐴 · 𝐴) + (2 · 𝐴)) + 1) ≤ (𝐶 · 𝐶))) | |
| 16 | 13, 14, 15 | syl2anc 411 | . . 3 ⊢ (𝜑 → (((𝐴 · 𝐴) + (2 · 𝐴)) < (𝐶 · 𝐶) ↔ (((𝐴 · 𝐴) + (2 · 𝐴)) + 1) ≤ (𝐶 · 𝐶))) |
| 17 | 1 | nn0cnd 9447 | . . . . . . 7 ⊢ (𝜑 → 𝐴 ∈ ℂ) |
| 18 | 1cnd 8185 | . . . . . . 7 ⊢ (𝜑 → 1 ∈ ℂ) | |
| 19 | binom2 10903 | . . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 1 ∈ ℂ) → ((𝐴 + 1)↑2) = (((𝐴↑2) + (2 · (𝐴 · 1))) + (1↑2))) | |
| 20 | 17, 18, 19 | syl2anc 411 | . . . . . 6 ⊢ (𝜑 → ((𝐴 + 1)↑2) = (((𝐴↑2) + (2 · (𝐴 · 1))) + (1↑2))) |
| 21 | 17, 18 | addcld 8189 | . . . . . . 7 ⊢ (𝜑 → (𝐴 + 1) ∈ ℂ) |
| 22 | 21 | sqvald 10922 | . . . . . 6 ⊢ (𝜑 → ((𝐴 + 1)↑2) = ((𝐴 + 1) · (𝐴 + 1))) |
| 23 | 17 | sqvald 10922 | . . . . . . . 8 ⊢ (𝜑 → (𝐴↑2) = (𝐴 · 𝐴)) |
| 24 | 23 | oveq1d 6028 | . . . . . . 7 ⊢ (𝜑 → ((𝐴↑2) + (2 · (𝐴 · 1))) = ((𝐴 · 𝐴) + (2 · (𝐴 · 1)))) |
| 25 | 18 | sqvald 10922 | . . . . . . 7 ⊢ (𝜑 → (1↑2) = (1 · 1)) |
| 26 | 24, 25 | oveq12d 6031 | . . . . . 6 ⊢ (𝜑 → (((𝐴↑2) + (2 · (𝐴 · 1))) + (1↑2)) = (((𝐴 · 𝐴) + (2 · (𝐴 · 1))) + (1 · 1))) |
| 27 | 20, 22, 26 | 3eqtr3d 2270 | . . . . 5 ⊢ (𝜑 → ((𝐴 + 1) · (𝐴 + 1)) = (((𝐴 · 𝐴) + (2 · (𝐴 · 1))) + (1 · 1))) |
| 28 | 17 | mulridd 8186 | . . . . . . . 8 ⊢ (𝜑 → (𝐴 · 1) = 𝐴) |
| 29 | 28 | oveq2d 6029 | . . . . . . 7 ⊢ (𝜑 → (2 · (𝐴 · 1)) = (2 · 𝐴)) |
| 30 | 29 | oveq2d 6029 | . . . . . 6 ⊢ (𝜑 → ((𝐴 · 𝐴) + (2 · (𝐴 · 1))) = ((𝐴 · 𝐴) + (2 · 𝐴))) |
| 31 | 18 | mulridd 8186 | . . . . . 6 ⊢ (𝜑 → (1 · 1) = 1) |
| 32 | 30, 31 | oveq12d 6031 | . . . . 5 ⊢ (𝜑 → (((𝐴 · 𝐴) + (2 · (𝐴 · 1))) + (1 · 1)) = (((𝐴 · 𝐴) + (2 · 𝐴)) + 1)) |
| 33 | 27, 32 | eqtrd 2262 | . . . 4 ⊢ (𝜑 → ((𝐴 + 1) · (𝐴 + 1)) = (((𝐴 · 𝐴) + (2 · 𝐴)) + 1)) |
| 34 | 33 | breq1d 4096 | . . 3 ⊢ (𝜑 → (((𝐴 + 1) · (𝐴 + 1)) ≤ (𝐶 · 𝐶) ↔ (((𝐴 · 𝐴) + (2 · 𝐴)) + 1) ≤ (𝐶 · 𝐶))) |
| 35 | 16, 34 | bitr4d 191 | . 2 ⊢ (𝜑 → (((𝐴 · 𝐴) + (2 · 𝐴)) < (𝐶 · 𝐶) ↔ ((𝐴 + 1) · (𝐴 + 1)) ≤ (𝐶 · 𝐶))) |
| 36 | 6, 8, 35 | 3bitr4d 220 | 1 ⊢ (𝜑 → (𝐴 < 𝐶 ↔ ((𝐴 · 𝐴) + (2 · 𝐴)) < (𝐶 · 𝐶))) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ↔ wb 105 = wceq 1395 ∈ wcel 2200 class class class wbr 4086 (class class class)co 6013 ℂcc 8020 1c1 8023 + caddc 8025 · cmul 8027 < clt 8204 ≤ cle 8205 2c2 9184 ℕ0cn0 9392 ↑cexp 10790 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-coll 4202 ax-sep 4205 ax-nul 4213 ax-pow 4262 ax-pr 4297 ax-un 4528 ax-setind 4633 ax-iinf 4684 ax-cnex 8113 ax-resscn 8114 ax-1cn 8115 ax-1re 8116 ax-icn 8117 ax-addcl 8118 ax-addrcl 8119 ax-mulcl 8120 ax-mulrcl 8121 ax-addcom 8122 ax-mulcom 8123 ax-addass 8124 ax-mulass 8125 ax-distr 8126 ax-i2m1 8127 ax-0lt1 8128 ax-1rid 8129 ax-0id 8130 ax-rnegex 8131 ax-precex 8132 ax-cnre 8133 ax-pre-ltirr 8134 ax-pre-ltwlin 8135 ax-pre-lttrn 8136 ax-pre-apti 8137 ax-pre-ltadd 8138 ax-pre-mulgt0 8139 ax-pre-mulext 8140 |
| This theorem depends on definitions: df-bi 117 df-dc 840 df-3or 1003 df-3an 1004 df-tru 1398 df-fal 1401 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ne 2401 df-nel 2496 df-ral 2513 df-rex 2514 df-reu 2515 df-rmo 2516 df-rab 2517 df-v 2802 df-sbc 3030 df-csb 3126 df-dif 3200 df-un 3202 df-in 3204 df-ss 3211 df-nul 3493 df-if 3604 df-pw 3652 df-sn 3673 df-pr 3674 df-op 3676 df-uni 3892 df-int 3927 df-iun 3970 df-br 4087 df-opab 4149 df-mpt 4150 df-tr 4186 df-id 4388 df-po 4391 df-iso 4392 df-iord 4461 df-on 4463 df-ilim 4464 df-suc 4466 df-iom 4687 df-xp 4729 df-rel 4730 df-cnv 4731 df-co 4732 df-dm 4733 df-rn 4734 df-res 4735 df-ima 4736 df-iota 5284 df-fun 5326 df-fn 5327 df-f 5328 df-f1 5329 df-fo 5330 df-f1o 5331 df-fv 5332 df-riota 5966 df-ov 6016 df-oprab 6017 df-mpo 6018 df-1st 6298 df-2nd 6299 df-recs 6466 df-frec 6552 df-pnf 8206 df-mnf 8207 df-xr 8208 df-ltxr 8209 df-le 8210 df-sub 8342 df-neg 8343 df-reap 8745 df-ap 8752 df-div 8843 df-inn 9134 df-2 9192 df-n0 9393 df-z 9470 df-uz 9746 df-seqfrec 10700 df-exp 10791 |
| This theorem is referenced by: nn0opthlem2d 10973 |
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