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Mirrors > Home > ILE Home > Th. List > zaddcllempos | GIF version |
Description: Lemma for zaddcl 9231. Special case in which 𝑁 is a positive integer. (Contributed by Jim Kingdon, 14-Mar-2020.) |
Ref | Expression |
---|---|
zaddcllempos | ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℕ) → (𝑀 + 𝑁) ∈ ℤ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | oveq2 5850 | . . . . 5 ⊢ (𝑥 = 1 → (𝑀 + 𝑥) = (𝑀 + 1)) | |
2 | 1 | eleq1d 2235 | . . . 4 ⊢ (𝑥 = 1 → ((𝑀 + 𝑥) ∈ ℤ ↔ (𝑀 + 1) ∈ ℤ)) |
3 | 2 | imbi2d 229 | . . 3 ⊢ (𝑥 = 1 → ((𝑀 ∈ ℤ → (𝑀 + 𝑥) ∈ ℤ) ↔ (𝑀 ∈ ℤ → (𝑀 + 1) ∈ ℤ))) |
4 | oveq2 5850 | . . . . 5 ⊢ (𝑥 = 𝑦 → (𝑀 + 𝑥) = (𝑀 + 𝑦)) | |
5 | 4 | eleq1d 2235 | . . . 4 ⊢ (𝑥 = 𝑦 → ((𝑀 + 𝑥) ∈ ℤ ↔ (𝑀 + 𝑦) ∈ ℤ)) |
6 | 5 | imbi2d 229 | . . 3 ⊢ (𝑥 = 𝑦 → ((𝑀 ∈ ℤ → (𝑀 + 𝑥) ∈ ℤ) ↔ (𝑀 ∈ ℤ → (𝑀 + 𝑦) ∈ ℤ))) |
7 | oveq2 5850 | . . . . 5 ⊢ (𝑥 = (𝑦 + 1) → (𝑀 + 𝑥) = (𝑀 + (𝑦 + 1))) | |
8 | 7 | eleq1d 2235 | . . . 4 ⊢ (𝑥 = (𝑦 + 1) → ((𝑀 + 𝑥) ∈ ℤ ↔ (𝑀 + (𝑦 + 1)) ∈ ℤ)) |
9 | 8 | imbi2d 229 | . . 3 ⊢ (𝑥 = (𝑦 + 1) → ((𝑀 ∈ ℤ → (𝑀 + 𝑥) ∈ ℤ) ↔ (𝑀 ∈ ℤ → (𝑀 + (𝑦 + 1)) ∈ ℤ))) |
10 | oveq2 5850 | . . . . 5 ⊢ (𝑥 = 𝑁 → (𝑀 + 𝑥) = (𝑀 + 𝑁)) | |
11 | 10 | eleq1d 2235 | . . . 4 ⊢ (𝑥 = 𝑁 → ((𝑀 + 𝑥) ∈ ℤ ↔ (𝑀 + 𝑁) ∈ ℤ)) |
12 | 11 | imbi2d 229 | . . 3 ⊢ (𝑥 = 𝑁 → ((𝑀 ∈ ℤ → (𝑀 + 𝑥) ∈ ℤ) ↔ (𝑀 ∈ ℤ → (𝑀 + 𝑁) ∈ ℤ))) |
13 | peano2z 9227 | . . 3 ⊢ (𝑀 ∈ ℤ → (𝑀 + 1) ∈ ℤ) | |
14 | peano2z 9227 | . . . . . 6 ⊢ ((𝑀 + 𝑦) ∈ ℤ → ((𝑀 + 𝑦) + 1) ∈ ℤ) | |
15 | zcn 9196 | . . . . . . . . 9 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ ℂ) | |
16 | 15 | adantl 275 | . . . . . . . 8 ⊢ ((𝑦 ∈ ℕ ∧ 𝑀 ∈ ℤ) → 𝑀 ∈ ℂ) |
17 | nncn 8865 | . . . . . . . . 9 ⊢ (𝑦 ∈ ℕ → 𝑦 ∈ ℂ) | |
18 | 17 | adantr 274 | . . . . . . . 8 ⊢ ((𝑦 ∈ ℕ ∧ 𝑀 ∈ ℤ) → 𝑦 ∈ ℂ) |
19 | 1cnd 7915 | . . . . . . . 8 ⊢ ((𝑦 ∈ ℕ ∧ 𝑀 ∈ ℤ) → 1 ∈ ℂ) | |
20 | 16, 18, 19 | addassd 7921 | . . . . . . 7 ⊢ ((𝑦 ∈ ℕ ∧ 𝑀 ∈ ℤ) → ((𝑀 + 𝑦) + 1) = (𝑀 + (𝑦 + 1))) |
21 | 20 | eleq1d 2235 | . . . . . 6 ⊢ ((𝑦 ∈ ℕ ∧ 𝑀 ∈ ℤ) → (((𝑀 + 𝑦) + 1) ∈ ℤ ↔ (𝑀 + (𝑦 + 1)) ∈ ℤ)) |
22 | 14, 21 | syl5ib 153 | . . . . 5 ⊢ ((𝑦 ∈ ℕ ∧ 𝑀 ∈ ℤ) → ((𝑀 + 𝑦) ∈ ℤ → (𝑀 + (𝑦 + 1)) ∈ ℤ)) |
23 | 22 | ex 114 | . . . 4 ⊢ (𝑦 ∈ ℕ → (𝑀 ∈ ℤ → ((𝑀 + 𝑦) ∈ ℤ → (𝑀 + (𝑦 + 1)) ∈ ℤ))) |
24 | 23 | a2d 26 | . . 3 ⊢ (𝑦 ∈ ℕ → ((𝑀 ∈ ℤ → (𝑀 + 𝑦) ∈ ℤ) → (𝑀 ∈ ℤ → (𝑀 + (𝑦 + 1)) ∈ ℤ))) |
25 | 3, 6, 9, 12, 13, 24 | nnind 8873 | . 2 ⊢ (𝑁 ∈ ℕ → (𝑀 ∈ ℤ → (𝑀 + 𝑁) ∈ ℤ)) |
26 | 25 | impcom 124 | 1 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℕ) → (𝑀 + 𝑁) ∈ ℤ) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 = wceq 1343 ∈ wcel 2136 (class class class)co 5842 ℂcc 7751 1c1 7754 + caddc 7756 ℕcn 8857 ℤcz 9191 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-14 2139 ax-ext 2147 ax-sep 4100 ax-pow 4153 ax-pr 4187 ax-setind 4514 ax-cnex 7844 ax-resscn 7845 ax-1cn 7846 ax-1re 7847 ax-icn 7848 ax-addcl 7849 ax-addrcl 7850 ax-mulcl 7851 ax-addcom 7853 ax-addass 7855 ax-distr 7857 ax-i2m1 7858 ax-0id 7861 ax-rnegex 7862 ax-cnre 7864 |
This theorem depends on definitions: df-bi 116 df-3or 969 df-3an 970 df-tru 1346 df-fal 1349 df-nf 1449 df-sb 1751 df-eu 2017 df-mo 2018 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-ne 2337 df-ral 2449 df-rex 2450 df-reu 2451 df-rab 2453 df-v 2728 df-sbc 2952 df-dif 3118 df-un 3120 df-in 3122 df-ss 3129 df-pw 3561 df-sn 3582 df-pr 3583 df-op 3585 df-uni 3790 df-int 3825 df-br 3983 df-opab 4044 df-id 4271 df-xp 4610 df-rel 4611 df-cnv 4612 df-co 4613 df-dm 4614 df-iota 5153 df-fun 5190 df-fv 5196 df-riota 5798 df-ov 5845 df-oprab 5846 df-mpo 5847 df-sub 8071 df-neg 8072 df-inn 8858 df-n0 9115 df-z 9192 |
This theorem is referenced by: zaddcl 9231 |
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