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| Mirrors > Home > MPE Home > Th. List > nnnn0addcl | Structured version Visualization version GIF version | ||
| Description: A positive integer plus a nonnegative integer is a positive integer. (Contributed by NM, 20-Apr-2005.) (Proof shortened by Mario Carneiro, 16-May-2014.) |
| Ref | Expression |
|---|---|
| nnnn0addcl | ⊢ ((𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ0) → (𝑀 + 𝑁) ∈ ℕ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elnn0 12401 | . 2 ⊢ (𝑁 ∈ ℕ0 ↔ (𝑁 ∈ ℕ ∨ 𝑁 = 0)) | |
| 2 | nnaddcl 12166 | . . 3 ⊢ ((𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → (𝑀 + 𝑁) ∈ ℕ) | |
| 3 | oveq2 7364 | . . . . 5 ⊢ (𝑁 = 0 → (𝑀 + 𝑁) = (𝑀 + 0)) | |
| 4 | nncn 12151 | . . . . . 6 ⊢ (𝑀 ∈ ℕ → 𝑀 ∈ ℂ) | |
| 5 | 4 | addridd 11331 | . . . . 5 ⊢ (𝑀 ∈ ℕ → (𝑀 + 0) = 𝑀) |
| 6 | 3, 5 | sylan9eqr 2791 | . . . 4 ⊢ ((𝑀 ∈ ℕ ∧ 𝑁 = 0) → (𝑀 + 𝑁) = 𝑀) |
| 7 | simpl 482 | . . . 4 ⊢ ((𝑀 ∈ ℕ ∧ 𝑁 = 0) → 𝑀 ∈ ℕ) | |
| 8 | 6, 7 | eqeltrd 2834 | . . 3 ⊢ ((𝑀 ∈ ℕ ∧ 𝑁 = 0) → (𝑀 + 𝑁) ∈ ℕ) |
| 9 | 2, 8 | jaodan 959 | . 2 ⊢ ((𝑀 ∈ ℕ ∧ (𝑁 ∈ ℕ ∨ 𝑁 = 0)) → (𝑀 + 𝑁) ∈ ℕ) |
| 10 | 1, 9 | sylan2b 594 | 1 ⊢ ((𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ0) → (𝑀 + 𝑁) ∈ ℕ) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 ∨ wo 847 = wceq 1541 ∈ wcel 2113 (class class class)co 7356 0cc0 11024 + caddc 11027 ℕcn 12143 ℕ0cn0 12399 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2706 ax-sep 5239 ax-nul 5249 ax-pow 5308 ax-pr 5375 ax-un 7678 ax-resscn 11081 ax-1cn 11082 ax-icn 11083 ax-addcl 11084 ax-addrcl 11085 ax-mulcl 11086 ax-mulrcl 11087 ax-mulcom 11088 ax-addass 11089 ax-mulass 11090 ax-distr 11091 ax-i2m1 11092 ax-1ne0 11093 ax-1rid 11094 ax-rnegex 11095 ax-rrecex 11096 ax-cnre 11097 ax-pre-lttri 11098 ax-pre-lttrn 11099 ax-pre-ltadd 11100 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2809 df-nfc 2883 df-ne 2931 df-nel 3035 df-ral 3050 df-rex 3059 df-reu 3349 df-rab 3398 df-v 3440 df-sbc 3739 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4862 df-iun 4946 df-br 5097 df-opab 5159 df-mpt 5178 df-tr 5204 df-id 5517 df-eprel 5522 df-po 5530 df-so 5531 df-fr 5575 df-we 5577 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-pred 6257 df-ord 6318 df-on 6319 df-lim 6320 df-suc 6321 df-iota 6446 df-fun 6492 df-fn 6493 df-f 6494 df-f1 6495 df-fo 6496 df-f1o 6497 df-fv 6498 df-ov 7359 df-om 7807 df-2nd 7932 df-frecs 8221 df-wrecs 8252 df-recs 8301 df-rdg 8339 df-er 8633 df-en 8882 df-dom 8883 df-sdom 8884 df-pnf 11166 df-mnf 11167 df-ltxr 11169 df-nn 12144 df-n0 12400 |
| This theorem is referenced by: nn0nnaddcl 12430 elz2 12504 bcxmas 15756 nnrisefaccl 15940 vdwapf 16898 vdwlem5 16911 vdwlem8 16914 dec2nprm 16993 ovolunlem1 25452 faclim2 35891 lcmineqlem3 42224 lcmineqlem4 42225 lcmineqlem6 42227 nnpw2pb 48775 |
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