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| Mirrors > Home > ILE Home > Th. List > nn0opthlem1d | GIF version | ||
| Description: A rather pretty lemma for nn0opth2 10985. (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 9417 | . . . . 5 ⊢ 1 ∈ ℕ0 | |
| 3 | 2 | a1i 9 | . . . 4 ⊢ (𝜑 → 1 ∈ ℕ0) |
| 4 | 1, 3 | nn0addcld 9458 | . . 3 ⊢ (𝜑 → (𝐴 + 1) ∈ ℕ0) |
| 5 | nn0opthlem1d.2 | . . 3 ⊢ (𝜑 → 𝐶 ∈ ℕ0) | |
| 6 | 4, 5 | nn0le2msqd 10980 | . 2 ⊢ (𝜑 → ((𝐴 + 1) ≤ 𝐶 ↔ ((𝐴 + 1) · (𝐴 + 1)) ≤ (𝐶 · 𝐶))) |
| 7 | nn0ltp1le 9541 | . . 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 9459 | . . . . 5 ⊢ (𝜑 → (𝐴 · 𝐴) ∈ ℕ0) |
| 10 | 2nn0 9418 | . . . . . . 7 ⊢ 2 ∈ ℕ0 | |
| 11 | 10 | a1i 9 | . . . . . 6 ⊢ (𝜑 → 2 ∈ ℕ0) |
| 12 | 11, 1 | nn0mulcld 9459 | . . . . 5 ⊢ (𝜑 → (2 · 𝐴) ∈ ℕ0) |
| 13 | 9, 12 | nn0addcld 9458 | . . . 4 ⊢ (𝜑 → ((𝐴 · 𝐴) + (2 · 𝐴)) ∈ ℕ0) |
| 14 | 5, 5 | nn0mulcld 9459 | . . . 4 ⊢ (𝜑 → (𝐶 · 𝐶) ∈ ℕ0) |
| 15 | nn0ltp1le 9541 | . . . 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 9456 | . . . . . . 7 ⊢ (𝜑 → 𝐴 ∈ ℂ) |
| 18 | 1cnd 8194 | . . . . . . 7 ⊢ (𝜑 → 1 ∈ ℂ) | |
| 19 | binom2 10912 | . . . . . . 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 8198 | . . . . . . 7 ⊢ (𝜑 → (𝐴 + 1) ∈ ℂ) |
| 22 | 21 | sqvald 10931 | . . . . . 6 ⊢ (𝜑 → ((𝐴 + 1)↑2) = ((𝐴 + 1) · (𝐴 + 1))) |
| 23 | 17 | sqvald 10931 | . . . . . . . 8 ⊢ (𝜑 → (𝐴↑2) = (𝐴 · 𝐴)) |
| 24 | 23 | oveq1d 6032 | . . . . . . 7 ⊢ (𝜑 → ((𝐴↑2) + (2 · (𝐴 · 1))) = ((𝐴 · 𝐴) + (2 · (𝐴 · 1)))) |
| 25 | 18 | sqvald 10931 | . . . . . . 7 ⊢ (𝜑 → (1↑2) = (1 · 1)) |
| 26 | 24, 25 | oveq12d 6035 | . . . . . 6 ⊢ (𝜑 → (((𝐴↑2) + (2 · (𝐴 · 1))) + (1↑2)) = (((𝐴 · 𝐴) + (2 · (𝐴 · 1))) + (1 · 1))) |
| 27 | 20, 22, 26 | 3eqtr3d 2272 | . . . . 5 ⊢ (𝜑 → ((𝐴 + 1) · (𝐴 + 1)) = (((𝐴 · 𝐴) + (2 · (𝐴 · 1))) + (1 · 1))) |
| 28 | 17 | mulridd 8195 | . . . . . . . 8 ⊢ (𝜑 → (𝐴 · 1) = 𝐴) |
| 29 | 28 | oveq2d 6033 | . . . . . . 7 ⊢ (𝜑 → (2 · (𝐴 · 1)) = (2 · 𝐴)) |
| 30 | 29 | oveq2d 6033 | . . . . . 6 ⊢ (𝜑 → ((𝐴 · 𝐴) + (2 · (𝐴 · 1))) = ((𝐴 · 𝐴) + (2 · 𝐴))) |
| 31 | 18 | mulridd 8195 | . . . . . 6 ⊢ (𝜑 → (1 · 1) = 1) |
| 32 | 30, 31 | oveq12d 6035 | . . . . 5 ⊢ (𝜑 → (((𝐴 · 𝐴) + (2 · (𝐴 · 1))) + (1 · 1)) = (((𝐴 · 𝐴) + (2 · 𝐴)) + 1)) |
| 33 | 27, 32 | eqtrd 2264 | . . . 4 ⊢ (𝜑 → ((𝐴 + 1) · (𝐴 + 1)) = (((𝐴 · 𝐴) + (2 · 𝐴)) + 1)) |
| 34 | 33 | breq1d 4098 | . . 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 1397 ∈ wcel 2202 class class class wbr 4088 (class class class)co 6017 ℂcc 8029 1c1 8032 + caddc 8034 · cmul 8036 < clt 8213 ≤ cle 8214 2c2 9193 ℕ0cn0 9401 ↑cexp 10799 |
| 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 619 ax-in2 620 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-13 2204 ax-14 2205 ax-ext 2213 ax-coll 4204 ax-sep 4207 ax-nul 4215 ax-pow 4264 ax-pr 4299 ax-un 4530 ax-setind 4635 ax-iinf 4686 ax-cnex 8122 ax-resscn 8123 ax-1cn 8124 ax-1re 8125 ax-icn 8126 ax-addcl 8127 ax-addrcl 8128 ax-mulcl 8129 ax-mulrcl 8130 ax-addcom 8131 ax-mulcom 8132 ax-addass 8133 ax-mulass 8134 ax-distr 8135 ax-i2m1 8136 ax-0lt1 8137 ax-1rid 8138 ax-0id 8139 ax-rnegex 8140 ax-precex 8141 ax-cnre 8142 ax-pre-ltirr 8143 ax-pre-ltwlin 8144 ax-pre-lttrn 8145 ax-pre-apti 8146 ax-pre-ltadd 8147 ax-pre-mulgt0 8148 ax-pre-mulext 8149 |
| This theorem depends on definitions: df-bi 117 df-dc 842 df-3or 1005 df-3an 1006 df-tru 1400 df-fal 1403 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ne 2403 df-nel 2498 df-ral 2515 df-rex 2516 df-reu 2517 df-rmo 2518 df-rab 2519 df-v 2804 df-sbc 3032 df-csb 3128 df-dif 3202 df-un 3204 df-in 3206 df-ss 3213 df-nul 3495 df-if 3606 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-int 3929 df-iun 3972 df-br 4089 df-opab 4151 df-mpt 4152 df-tr 4188 df-id 4390 df-po 4393 df-iso 4394 df-iord 4463 df-on 4465 df-ilim 4466 df-suc 4468 df-iom 4689 df-xp 4731 df-rel 4732 df-cnv 4733 df-co 4734 df-dm 4735 df-rn 4736 df-res 4737 df-ima 4738 df-iota 5286 df-fun 5328 df-fn 5329 df-f 5330 df-f1 5331 df-fo 5332 df-f1o 5333 df-fv 5334 df-riota 5970 df-ov 6020 df-oprab 6021 df-mpo 6022 df-1st 6302 df-2nd 6303 df-recs 6470 df-frec 6556 df-pnf 8215 df-mnf 8216 df-xr 8217 df-ltxr 8218 df-le 8219 df-sub 8351 df-neg 8352 df-reap 8754 df-ap 8761 df-div 8852 df-inn 9143 df-2 9201 df-n0 9402 df-z 9479 df-uz 9755 df-seqfrec 10709 df-exp 10800 |
| This theorem is referenced by: nn0opthlem2d 10982 |
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