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| Mirrors > Home > MPE Home > Th. List > zaddcl | Structured version Visualization version GIF version | ||
| Description: Closure of addition of integers. (Contributed by NM, 9-May-2004.) (Proof shortened by Mario Carneiro, 16-May-2014.) |
| Ref | Expression |
|---|---|
| zaddcl | ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 + 𝑁) ∈ ℤ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elz2 12533 | . 2 ⊢ (𝑀 ∈ ℤ ↔ ∃𝑥 ∈ ℕ ∃𝑦 ∈ ℕ 𝑀 = (𝑥 − 𝑦)) | |
| 2 | elz2 12533 | . 2 ⊢ (𝑁 ∈ ℤ ↔ ∃𝑧 ∈ ℕ ∃𝑤 ∈ ℕ 𝑁 = (𝑧 − 𝑤)) | |
| 3 | reeanv 3211 | . . 3 ⊢ (∃𝑥 ∈ ℕ ∃𝑧 ∈ ℕ (∃𝑦 ∈ ℕ 𝑀 = (𝑥 − 𝑦) ∧ ∃𝑤 ∈ ℕ 𝑁 = (𝑧 − 𝑤)) ↔ (∃𝑥 ∈ ℕ ∃𝑦 ∈ ℕ 𝑀 = (𝑥 − 𝑦) ∧ ∃𝑧 ∈ ℕ ∃𝑤 ∈ ℕ 𝑁 = (𝑧 − 𝑤))) | |
| 4 | reeanv 3211 | . . . . 5 ⊢ (∃𝑦 ∈ ℕ ∃𝑤 ∈ ℕ (𝑀 = (𝑥 − 𝑦) ∧ 𝑁 = (𝑧 − 𝑤)) ↔ (∃𝑦 ∈ ℕ 𝑀 = (𝑥 − 𝑦) ∧ ∃𝑤 ∈ ℕ 𝑁 = (𝑧 − 𝑤))) | |
| 5 | nnaddcl 12188 | . . . . . . . . . 10 ⊢ ((𝑥 ∈ ℕ ∧ 𝑧 ∈ ℕ) → (𝑥 + 𝑧) ∈ ℕ) | |
| 6 | 5 | adantr 481 | . . . . . . . . 9 ⊢ (((𝑥 ∈ ℕ ∧ 𝑧 ∈ ℕ) ∧ (𝑦 ∈ ℕ ∧ 𝑤 ∈ ℕ)) → (𝑥 + 𝑧) ∈ ℕ) |
| 7 | nnaddcl 12188 | . . . . . . . . . 10 ⊢ ((𝑦 ∈ ℕ ∧ 𝑤 ∈ ℕ) → (𝑦 + 𝑤) ∈ ℕ) | |
| 8 | 7 | adantl 482 | . . . . . . . . 9 ⊢ (((𝑥 ∈ ℕ ∧ 𝑧 ∈ ℕ) ∧ (𝑦 ∈ ℕ ∧ 𝑤 ∈ ℕ)) → (𝑦 + 𝑤) ∈ ℕ) |
| 9 | nncn 12173 | . . . . . . . . . . . 12 ⊢ (𝑥 ∈ ℕ → 𝑥 ∈ ℂ) | |
| 10 | nncn 12173 | . . . . . . . . . . . 12 ⊢ (𝑧 ∈ ℕ → 𝑧 ∈ ℂ) | |
| 11 | 9, 10 | anim12i 619 | . . . . . . . . . . 11 ⊢ ((𝑥 ∈ ℕ ∧ 𝑧 ∈ ℕ) → (𝑥 ∈ ℂ ∧ 𝑧 ∈ ℂ)) |
| 12 | nncn 12173 | . . . . . . . . . . . 12 ⊢ (𝑦 ∈ ℕ → 𝑦 ∈ ℂ) | |
| 13 | nncn 12173 | . . . . . . . . . . . 12 ⊢ (𝑤 ∈ ℕ → 𝑤 ∈ ℂ) | |
| 14 | 12, 13 | anim12i 619 | . . . . . . . . . . 11 ⊢ ((𝑦 ∈ ℕ ∧ 𝑤 ∈ ℕ) → (𝑦 ∈ ℂ ∧ 𝑤 ∈ ℂ)) |
| 15 | addsub4 11428 | . . . . . . . . . . 11 ⊢ (((𝑥 ∈ ℂ ∧ 𝑧 ∈ ℂ) ∧ (𝑦 ∈ ℂ ∧ 𝑤 ∈ ℂ)) → ((𝑥 + 𝑧) − (𝑦 + 𝑤)) = ((𝑥 − 𝑦) + (𝑧 − 𝑤))) | |
| 16 | 11, 14, 15 | syl2an 602 | . . . . . . . . . 10 ⊢ (((𝑥 ∈ ℕ ∧ 𝑧 ∈ ℕ) ∧ (𝑦 ∈ ℕ ∧ 𝑤 ∈ ℕ)) → ((𝑥 + 𝑧) − (𝑦 + 𝑤)) = ((𝑥 − 𝑦) + (𝑧 − 𝑤))) |
| 17 | 16 | eqcomd 2745 | . . . . . . . . 9 ⊢ (((𝑥 ∈ ℕ ∧ 𝑧 ∈ ℕ) ∧ (𝑦 ∈ ℕ ∧ 𝑤 ∈ ℕ)) → ((𝑥 − 𝑦) + (𝑧 − 𝑤)) = ((𝑥 + 𝑧) − (𝑦 + 𝑤))) |
| 18 | rspceov 7405 | . . . . . . . . 9 ⊢ (((𝑥 + 𝑧) ∈ ℕ ∧ (𝑦 + 𝑤) ∈ ℕ ∧ ((𝑥 − 𝑦) + (𝑧 − 𝑤)) = ((𝑥 + 𝑧) − (𝑦 + 𝑤))) → ∃𝑢 ∈ ℕ ∃𝑣 ∈ ℕ ((𝑥 − 𝑦) + (𝑧 − 𝑤)) = (𝑢 − 𝑣)) | |
| 19 | 6, 8, 17, 18 | syl3anc 1379 | . . . . . . . 8 ⊢ (((𝑥 ∈ ℕ ∧ 𝑧 ∈ ℕ) ∧ (𝑦 ∈ ℕ ∧ 𝑤 ∈ ℕ)) → ∃𝑢 ∈ ℕ ∃𝑣 ∈ ℕ ((𝑥 − 𝑦) + (𝑧 − 𝑤)) = (𝑢 − 𝑣)) |
| 20 | elz2 12533 | . . . . . . . 8 ⊢ (((𝑥 − 𝑦) + (𝑧 − 𝑤)) ∈ ℤ ↔ ∃𝑢 ∈ ℕ ∃𝑣 ∈ ℕ ((𝑥 − 𝑦) + (𝑧 − 𝑤)) = (𝑢 − 𝑣)) | |
| 21 | 19, 20 | sylibr 235 | . . . . . . 7 ⊢ (((𝑥 ∈ ℕ ∧ 𝑧 ∈ ℕ) ∧ (𝑦 ∈ ℕ ∧ 𝑤 ∈ ℕ)) → ((𝑥 − 𝑦) + (𝑧 − 𝑤)) ∈ ℤ) |
| 22 | oveq12 7365 | . . . . . . . 8 ⊢ ((𝑀 = (𝑥 − 𝑦) ∧ 𝑁 = (𝑧 − 𝑤)) → (𝑀 + 𝑁) = ((𝑥 − 𝑦) + (𝑧 − 𝑤))) | |
| 23 | 22 | eleq1d 2824 | . . . . . . 7 ⊢ ((𝑀 = (𝑥 − 𝑦) ∧ 𝑁 = (𝑧 − 𝑤)) → ((𝑀 + 𝑁) ∈ ℤ ↔ ((𝑥 − 𝑦) + (𝑧 − 𝑤)) ∈ ℤ)) |
| 24 | 21, 23 | syl5ibrcom 248 | . . . . . 6 ⊢ (((𝑥 ∈ ℕ ∧ 𝑧 ∈ ℕ) ∧ (𝑦 ∈ ℕ ∧ 𝑤 ∈ ℕ)) → ((𝑀 = (𝑥 − 𝑦) ∧ 𝑁 = (𝑧 − 𝑤)) → (𝑀 + 𝑁) ∈ ℤ)) |
| 25 | 24 | rexlimdvva 3196 | . . . . 5 ⊢ ((𝑥 ∈ ℕ ∧ 𝑧 ∈ ℕ) → (∃𝑦 ∈ ℕ ∃𝑤 ∈ ℕ (𝑀 = (𝑥 − 𝑦) ∧ 𝑁 = (𝑧 − 𝑤)) → (𝑀 + 𝑁) ∈ ℤ)) |
| 26 | 4, 25 | biimtrrid 244 | . . . 4 ⊢ ((𝑥 ∈ ℕ ∧ 𝑧 ∈ ℕ) → ((∃𝑦 ∈ ℕ 𝑀 = (𝑥 − 𝑦) ∧ ∃𝑤 ∈ ℕ 𝑁 = (𝑧 − 𝑤)) → (𝑀 + 𝑁) ∈ ℤ)) |
| 27 | 26 | rexlimivv 3181 | . . 3 ⊢ (∃𝑥 ∈ ℕ ∃𝑧 ∈ ℕ (∃𝑦 ∈ ℕ 𝑀 = (𝑥 − 𝑦) ∧ ∃𝑤 ∈ ℕ 𝑁 = (𝑧 − 𝑤)) → (𝑀 + 𝑁) ∈ ℤ) |
| 28 | 3, 27 | sylbir 236 | . 2 ⊢ ((∃𝑥 ∈ ℕ ∃𝑦 ∈ ℕ 𝑀 = (𝑥 − 𝑦) ∧ ∃𝑧 ∈ ℕ ∃𝑤 ∈ ℕ 𝑁 = (𝑧 − 𝑤)) → (𝑀 + 𝑁) ∈ ℤ) |
| 29 | 1, 2, 28 | syl2anb 604 | 1 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 + 𝑁) ∈ ℤ) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 396 = wceq 1547 ∈ wcel 2119 ∃wrex 3063 (class class class)co 7356 ℂcc 11027 + caddc 11032 − cmin 11368 ℕcn 12165 ℤcz 12515 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2711 ax-sep 5218 ax-nul 5228 ax-pow 5294 ax-pr 5362 ax-un 7678 ax-resscn 11086 ax-1cn 11087 ax-icn 11088 ax-addcl 11089 ax-addrcl 11090 ax-mulcl 11091 ax-mulrcl 11092 ax-mulcom 11093 ax-addass 11094 ax-mulass 11095 ax-distr 11096 ax-i2m1 11097 ax-1ne0 11098 ax-1rid 11099 ax-rnegex 11100 ax-rrecex 11101 ax-cnre 11102 ax-pre-lttri 11103 ax-pre-lttrn 11104 ax-pre-ltadd 11105 ax-pre-mulgt0 11106 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3or 1093 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2718 df-cleq 2731 df-clel 2814 df-nfc 2888 df-ne 2935 df-nel 3039 df-ral 3054 df-rex 3064 df-reu 3345 df-rab 3392 df-v 3433 df-sbc 3724 df-csb 3832 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3903 df-nul 4262 df-if 4455 df-pw 4531 df-sn 4556 df-pr 4558 df-op 4562 df-uni 4839 df-iun 4923 df-br 5073 df-opab 5135 df-mpt 5154 df-tr 5180 df-id 5513 df-eprel 5518 df-po 5526 df-so 5527 df-fr 5571 df-we 5573 df-xp 5624 df-rel 5625 df-cnv 5626 df-co 5627 df-dm 5628 df-rn 5629 df-res 5630 df-ima 5631 df-pred 6252 df-ord 6313 df-on 6314 df-lim 6315 df-suc 6316 df-iota 6441 df-fun 6487 df-fn 6488 df-f 6489 df-f1 6490 df-fo 6491 df-f1o 6492 df-fv 6493 df-riota 7313 df-ov 7359 df-oprab 7360 df-mpo 7361 df-om 7807 df-2nd 7932 df-frecs 8221 df-wrecs 8252 df-recs 8301 df-rdg 8339 df-er 8633 df-en 8884 df-dom 8885 df-sdom 8886 df-pnf 11172 df-mnf 11173 df-xr 11174 df-ltxr 11175 df-le 11176 df-sub 11370 df-neg 11371 df-nn 12166 df-n0 12429 df-z 12516 |
| This theorem is referenced by: peano2z 12559 zsubcl 12560 zrevaddcl 12563 zdivadd 12591 zaddcld 12628 eluzadd 12808 nn0pzuz 12846 fzen 13486 fzaddel 13503 fzadd2 13504 fzrev3 13535 fzrevral3 13559 elfzmlbp 13584 fzoun 13642 fzoaddel 13663 zpnn0elfzo 13684 elfzomelpfzo 13718 fzoshftral 13733 modsumfzodifsn 13897 ccatsymb 14536 ccatval21sw 14539 lswccatn0lsw 14545 swrdccatin2 14682 revccat 14719 2cshw 14766 cshweqrep 14774 2cshwcshw 14778 cshwcsh2id 14781 cshco 14789 climshftlem 15527 isershft 15617 iseraltlem2 15636 fsumzcl 15688 zrisefaccl 15976 summodnegmod 16246 dvds2ln 16249 dvds2add 16250 dvdsadd 16262 dvdsadd2b 16266 addmodlteqALT 16285 3dvdsdec 16292 3dvds2dec 16293 opoe 16323 opeo 16325 divalglem2 16355 ndvdsadd 16370 gcdaddmlem 16484 pythagtriplem9 16786 difsqpwdvds 16849 gzaddcl 16899 mod2xnegi 17033 cshwshashlem2 17058 cycsubgcl 19172 efgredleme 19709 zaddablx 19838 pgpfac1lem2 20043 zsubrg 21395 zringsub 21430 zringmulg 21431 expghm 21450 mulgghm2 21451 pzriprnglem4 21459 cygznlem3 21544 iaa 26309 dchrisumlem1 27470 axlowdimlem16 29044 crctcshwlkn0lem4 29899 crctcshwlkn0 29907 clwwlkccatlem 30077 clwwisshclwwslemlem 30101 elrgspnlem1 33323 ballotlemsima 34700 mzpclall 43176 mzpindd 43195 rmxyadd 43366 jm2.18 43433 inductionexd 44599 dvdsn1add 46382 stoweidlem34 46477 fourierswlem 46673 nthrucw 47331 2elfz2melfz 47781 submodaddmod 47810 submodneaddmod 47820 modmkpkne 47830 opoeALTV 48174 opeoALTV 48175 even3prm2 48210 mogoldbblem 48211 gbowgt5 48253 gboge9 48255 sbgoldbst 48269 2zrngamgm 48736 |
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