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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 9660 | . . 3 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ ℂ) | |
| 2 | zcn 9660 | . . 3 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℂ) | |
| 3 | negsub 8581 | . . 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 9686 | . . 3 ⊢ (𝑁 ∈ ℤ → -𝑁 ∈ ℤ) | |
| 6 | zaddcl 9695 | . . 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 6088 ℂcc 8183 + caddc 8188 − cmin 8504 -cneg 8505 ℤcz 9655 |
| 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 4251 ax-pow 4313 ax-pr 4348 ax-un 4580 ax-setind 4686 ax-cnex 8276 ax-resscn 8277 ax-1cn 8278 ax-1re 8279 ax-icn 8280 ax-addcl 8281 ax-addrcl 8282 ax-mulcl 8283 ax-addcom 8285 ax-addass 8287 ax-distr 8289 ax-i2m1 8290 ax-0lt1 8291 ax-0id 8293 ax-rnegex 8294 ax-cnre 8296 ax-pre-ltirr 8297 ax-pre-ltwlin 8298 ax-pre-lttrn 8299 ax-pre-ltadd 8301 |
| 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 4132 df-opab 4194 df-id 4440 df-xp 4782 df-rel 4783 df-cnv 4784 df-co 4785 df-dm 4786 df-iota 5340 df-fun 5382 df-fv 5388 df-riota 6041 df-ov 6091 df-oprab 6092 df-mpo 6093 df-pnf 8368 df-mnf 8369 df-xr 8370 df-ltxr 8371 df-le 8372 df-sub 8506 df-neg 8507 df-inn 9314 df-n0 9575 df-z 9656 |
| This theorem is used by: ztri3or 9698 zrevaddcl 9706 znnsub 9707 nzadd 9708 znn0sub 9721 zneo 9758 zsubcld 9784 eluzsubi 9966 fzen 10464 uzsubsubfz 10469 fzrev 10508 fzrev2 10509 fzrevral2 10530 fzshftral 10532 fz0fzdiffz0 10554 difelfzle 10558 difelfznle 10559 fzo0n 10592 elfzomelpfzo 10666 zmodcl 10802 frecfzen2 10885 facndiv 11199 bccmpl 11214 bcpasc 11226 hashfz 11284 swrdspsleq 11461 pfxccatin12lem4 11520 pfxccatin12lem2a 11521 pfxccatin12lem1 11522 pfxccatin12lem2 11525 swrdccat 11529 moddvds 12591 modmulconst 12615 dvds2sub 12618 dvdssub2 12627 dvdssubr 12631 fzocongeq 12650 3dvds 12656 odd2np1 12665 omoe 12688 omeo 12690 divalgb 12717 divalgmod 12719 ndvdsadd 12723 nn0seqcvgd 12844 congr 12903 cncongr1 12906 cncongr2 12907 prmdiv 13042 prmdiveq 13043 pythagtriplem4 13076 pythagtriplem8 13080 difsqpwdvds 13146 mod2xnegi 13227 bposlem6 16316 gausslemma2dlem6 16391 lgsquadlem1 16401 |
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