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| Mirrors > Home > ILE Home > Th. List > zsubcl | GIF version | ||
| Description: Closure of subtraction of integers. (Contributed by NM, 11-May-2004.) |
| Ref | Expression |
|---|---|
| zsubcl | ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 − 𝑁) ∈ ℤ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | zcn 9653 | . . 3 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ ℂ) | |
| 2 | zcn 9653 | . . 3 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℂ) | |
| 3 | negsub 8575 | . . 3 ⊢ ((𝑀 ∈ ℂ ∧ 𝑁 ∈ ℂ) → (𝑀 + -𝑁) = (𝑀 − 𝑁)) | |
| 4 | 1, 2, 3 | syl2an 289 | . 2 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 + -𝑁) = (𝑀 − 𝑁)) |
| 5 | znegcl 9679 | . . 3 ⊢ (𝑁 ∈ ℤ → -𝑁 ∈ ℤ) | |
| 6 | zaddcl 9688 | . . 3 ⊢ ((𝑀 ∈ ℤ ∧ -𝑁 ∈ ℤ) → (𝑀 + -𝑁) ∈ ℤ) | |
| 7 | 5, 6 | sylan2 286 | . 2 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 + -𝑁) ∈ ℤ) |
| 8 | 4, 7 | eqeltrrd 2316 | 1 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 − 𝑁) ∈ ℤ) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 104 = wceq 1402 ∈ wcel 2209 (class class class)co 6085 ℂcc 8177 + caddc 8182 − cmin 8498 -cneg 8499 ℤcz 9648 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4249 ax-pow 4311 ax-pr 4346 ax-un 4578 ax-setind 4684 ax-cnex 8270 ax-resscn 8271 ax-1cn 8272 ax-1re 8273 ax-icn 8274 ax-addcl 8275 ax-addrcl 8276 ax-mulcl 8277 ax-addcom 8279 ax-addass 8281 ax-distr 8283 ax-i2m1 8284 ax-0lt1 8285 ax-0id 8287 ax-rnegex 8288 ax-cnre 8290 ax-pre-ltirr 8291 ax-pre-ltwlin 8292 ax-pre-lttrn 8293 ax-pre-ltadd 8295 |
| This proof depends on definitions: df-bi 117 df-3or 1010 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-nel 2516 df-ral 2533 df-rex 2534 df-reu 2535 df-rab 2537 df-v 2823 df-sbc 3052 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-int 3971 df-br 4131 df-opab 4193 df-id 4438 df-xp 4780 df-rel 4781 df-cnv 4782 df-co 4783 df-dm 4784 df-iota 5337 df-fun 5379 df-fv 5385 df-riota 6038 df-ov 6088 df-oprab 6089 df-mpo 6090 df-pnf 8362 df-mnf 8363 df-xr 8364 df-ltxr 8365 df-le 8366 df-sub 8500 df-neg 8501 df-inn 9307 df-n0 9568 df-z 9649 |
| This theorem is used by: ztri3or 9691 zrevaddcl 9699 znnsub 9700 nzadd 9701 znn0sub 9714 zneo 9751 zsubcld 9777 eluzsubi 9959 fzen 10457 uzsubsubfz 10462 fzrev 10501 fzrev2 10502 fzrevral2 10523 fzshftral 10525 fz0fzdiffz0 10547 difelfzle 10551 difelfznle 10552 fzo0n 10585 elfzomelpfzo 10659 zmodcl 10794 frecfzen2 10877 facndiv 11191 bccmpl 11206 bcpasc 11218 hashfz 11276 swrdspsleq 11453 pfxccatin12lem4 11512 pfxccatin12lem2a 11513 pfxccatin12lem1 11514 pfxccatin12lem2 11517 swrdccat 11521 moddvds 12582 modmulconst 12606 dvds2sub 12609 dvdssub2 12618 dvdssubr 12622 fzocongeq 12641 3dvds 12647 odd2np1 12656 omoe 12679 omeo 12681 divalgb 12708 divalgmod 12710 ndvdsadd 12714 nn0seqcvgd 12835 congr 12894 cncongr1 12897 cncongr2 12898 prmdiv 13033 prmdiveq 13034 pythagtriplem4 13067 pythagtriplem8 13071 difsqpwdvds 13137 mod2xnegi 13218 gausslemma2dlem6 16284 lgsquadlem1 16294 |
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