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| Mirrors > Home > MPE Home > Th. List > Mathboxes > itcovalt2lem2lem1 | Structured version Visualization version GIF version | ||
| Description: Lemma 1 for itcovalt2lem2 49336. (Contributed by AV, 6-May-2024.) |
| Ref | Expression |
|---|---|
| itcovalt2lem2lem1 | ⊢ (((𝑌 ∈ ℕ ∧ 𝐶 ∈ ℕ0) ∧ 𝑁 ∈ ℕ0) → (((𝑁 + 𝐶) · 𝑌) − 𝐶) ∈ ℕ0) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nn0re 12509 | . . . . 5 ⊢ (𝐶 ∈ ℕ0 → 𝐶 ∈ ℝ) | |
| 2 | 1 | adantl 486 | . . . 4 ⊢ ((𝑌 ∈ ℕ ∧ 𝐶 ∈ ℕ0) → 𝐶 ∈ ℝ) |
| 3 | 2 | adantr 485 | . . 3 ⊢ (((𝑌 ∈ ℕ ∧ 𝐶 ∈ ℕ0) ∧ 𝑁 ∈ ℕ0) → 𝐶 ∈ ℝ) |
| 4 | simpr 489 | . . . . 5 ⊢ (((𝑌 ∈ ℕ ∧ 𝐶 ∈ ℕ0) ∧ 𝑁 ∈ ℕ0) → 𝑁 ∈ ℕ0) | |
| 5 | simpr 489 | . . . . . 6 ⊢ ((𝑌 ∈ ℕ ∧ 𝐶 ∈ ℕ0) → 𝐶 ∈ ℕ0) | |
| 6 | 5 | adantr 485 | . . . . 5 ⊢ (((𝑌 ∈ ℕ ∧ 𝐶 ∈ ℕ0) ∧ 𝑁 ∈ ℕ0) → 𝐶 ∈ ℕ0) |
| 7 | 4, 6 | nn0addcld 12565 | . . . 4 ⊢ (((𝑌 ∈ ℕ ∧ 𝐶 ∈ ℕ0) ∧ 𝑁 ∈ ℕ0) → (𝑁 + 𝐶) ∈ ℕ0) |
| 8 | 7 | nn0red 12562 | . . 3 ⊢ (((𝑌 ∈ ℕ ∧ 𝐶 ∈ ℕ0) ∧ 𝑁 ∈ ℕ0) → (𝑁 + 𝐶) ∈ ℝ) |
| 9 | nnnn0 12507 | . . . . . 6 ⊢ (𝑌 ∈ ℕ → 𝑌 ∈ ℕ0) | |
| 10 | 9 | ad2antrr 738 | . . . . 5 ⊢ (((𝑌 ∈ ℕ ∧ 𝐶 ∈ ℕ0) ∧ 𝑁 ∈ ℕ0) → 𝑌 ∈ ℕ0) |
| 11 | 7, 10 | nn0mulcld 12566 | . . . 4 ⊢ (((𝑌 ∈ ℕ ∧ 𝐶 ∈ ℕ0) ∧ 𝑁 ∈ ℕ0) → ((𝑁 + 𝐶) · 𝑌) ∈ ℕ0) |
| 12 | 11 | nn0red 12562 | . . 3 ⊢ (((𝑌 ∈ ℕ ∧ 𝐶 ∈ ℕ0) ∧ 𝑁 ∈ ℕ0) → ((𝑁 + 𝐶) · 𝑌) ∈ ℝ) |
| 13 | nn0ge0 12525 | . . . . 5 ⊢ (𝑁 ∈ ℕ0 → 0 ≤ 𝑁) | |
| 14 | 13 | adantl 486 | . . . 4 ⊢ (((𝑌 ∈ ℕ ∧ 𝐶 ∈ ℕ0) ∧ 𝑁 ∈ ℕ0) → 0 ≤ 𝑁) |
| 15 | 6 | nn0red 12562 | . . . . 5 ⊢ (((𝑌 ∈ ℕ ∧ 𝐶 ∈ ℕ0) ∧ 𝑁 ∈ ℕ0) → 𝐶 ∈ ℝ) |
| 16 | 4 | nn0red 12562 | . . . . 5 ⊢ (((𝑌 ∈ ℕ ∧ 𝐶 ∈ ℕ0) ∧ 𝑁 ∈ ℕ0) → 𝑁 ∈ ℝ) |
| 17 | 15, 16 | addge02d 11799 | . . . 4 ⊢ (((𝑌 ∈ ℕ ∧ 𝐶 ∈ ℕ0) ∧ 𝑁 ∈ ℕ0) → (0 ≤ 𝑁 ↔ 𝐶 ≤ (𝑁 + 𝐶))) |
| 18 | 14, 17 | mpbid 235 | . . 3 ⊢ (((𝑌 ∈ ℕ ∧ 𝐶 ∈ ℕ0) ∧ 𝑁 ∈ ℕ0) → 𝐶 ≤ (𝑁 + 𝐶)) |
| 19 | simpll 778 | . . . . 5 ⊢ (((𝑌 ∈ ℕ ∧ 𝐶 ∈ ℕ0) ∧ 𝑁 ∈ ℕ0) → 𝑌 ∈ ℕ) | |
| 20 | 19 | nnred 12244 | . . . 4 ⊢ (((𝑌 ∈ ℕ ∧ 𝐶 ∈ ℕ0) ∧ 𝑁 ∈ ℕ0) → 𝑌 ∈ ℝ) |
| 21 | 7 | nn0ge0d 12564 | . . . 4 ⊢ (((𝑌 ∈ ℕ ∧ 𝐶 ∈ ℕ0) ∧ 𝑁 ∈ ℕ0) → 0 ≤ (𝑁 + 𝐶)) |
| 22 | nnge1 12260 | . . . . 5 ⊢ (𝑌 ∈ ℕ → 1 ≤ 𝑌) | |
| 23 | 22 | ad2antrr 738 | . . . 4 ⊢ (((𝑌 ∈ ℕ ∧ 𝐶 ∈ ℕ0) ∧ 𝑁 ∈ ℕ0) → 1 ≤ 𝑌) |
| 24 | 8, 20, 21, 23 | lemulge11d 12148 | . . 3 ⊢ (((𝑌 ∈ ℕ ∧ 𝐶 ∈ ℕ0) ∧ 𝑁 ∈ ℕ0) → (𝑁 + 𝐶) ≤ ((𝑁 + 𝐶) · 𝑌)) |
| 25 | 3, 8, 12, 18, 24 | letrd 11363 | . 2 ⊢ (((𝑌 ∈ ℕ ∧ 𝐶 ∈ ℕ0) ∧ 𝑁 ∈ ℕ0) → 𝐶 ≤ ((𝑁 + 𝐶) · 𝑌)) |
| 26 | nn0sub 12550 | . . 3 ⊢ ((𝐶 ∈ ℕ0 ∧ ((𝑁 + 𝐶) · 𝑌) ∈ ℕ0) → (𝐶 ≤ ((𝑁 + 𝐶) · 𝑌) ↔ (((𝑁 + 𝐶) · 𝑌) − 𝐶) ∈ ℕ0)) | |
| 27 | 6, 11, 26 | syl2anc 595 | . 2 ⊢ (((𝑌 ∈ ℕ ∧ 𝐶 ∈ ℕ0) ∧ 𝑁 ∈ ℕ0) → (𝐶 ≤ ((𝑁 + 𝐶) · 𝑌) ↔ (((𝑁 + 𝐶) · 𝑌) − 𝐶) ∈ ℕ0)) |
| 28 | 25, 27 | mpbid 235 | 1 ⊢ (((𝑌 ∈ ℕ ∧ 𝐶 ∈ ℕ0) ∧ 𝑁 ∈ ℕ0) → (((𝑁 + 𝐶) · 𝑌) − 𝐶) ∈ ℕ0) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 209 ∧ wa 400 ∈ wcel 2149 class class class wbr 5110 (class class class)co 7408 ℝcr 11095 0cc0 11096 1c1 11097 + caddc 11099 · cmul 11101 ≤ cle 11240 − cmin 11437 ℕcn 12229 ℕ0cn0 12500 |
| 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-sep 5258 ax-nul 5268 ax-pow 5334 ax-pr 5402 ax-un 7730 ax-resscn 11153 ax-1cn 11154 ax-icn 11155 ax-addcl 11156 ax-addrcl 11157 ax-mulcl 11158 ax-mulrcl 11159 ax-mulcom 11160 ax-addass 11161 ax-mulass 11162 ax-distr 11163 ax-i2m1 11164 ax-1ne0 11165 ax-1rid 11166 ax-rnegex 11167 ax-rrecex 11168 ax-cnre 11169 ax-pre-lttri 11170 ax-pre-lttrn 11171 ax-pre-ltadd 11172 ax-pre-mulgt0 11173 |
| 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-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 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4874 df-iun 4959 df-br 5111 df-opab 5175 df-mpt 5194 df-tr 5220 df-id 5554 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-we 5614 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-pred 6300 df-ord 6361 df-on 6362 df-lim 6363 df-suc 6364 df-iota 6490 df-fun 6536 df-fn 6537 df-f 6538 df-f1 6539 df-fo 6540 df-f1o 6541 df-fv 6542 df-riota 7365 df-ov 7411 df-oprab 7412 df-mpo 7413 df-om 7859 df-2nd 7983 df-frecs 8274 df-wrecs 8305 df-recs 8354 df-rdg 8393 df-er 8690 df-en 8940 df-dom 8941 df-sdom 8942 df-pnf 11241 df-mnf 11242 df-xr 11243 df-ltxr 11244 df-le 11245 df-sub 11439 df-neg 11440 df-nn 12230 df-n0 12501 |
| This theorem is referenced by: itcovalt2lem2 49336 |
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