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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 9654 | . . 3 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ ℂ) | |
| 2 | zcn 9654 | . . 3 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℂ) | |
| 3 | negsub 8576 | . . 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 9680 | . . 3 ⊢ (𝑁 ∈ ℤ → -𝑁 ∈ ℤ) | |
| 6 | zaddcl 9689 | . . 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 8178 + caddc 8183 − cmin 8499 -cneg 8500 ℤcz 9649 |
| 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 8271 ax-resscn 8272 ax-1cn 8273 ax-1re 8274 ax-icn 8275 ax-addcl 8276 ax-addrcl 8277 ax-mulcl 8278 ax-addcom 8280 ax-addass 8282 ax-distr 8284 ax-i2m1 8285 ax-0lt1 8286 ax-0id 8288 ax-rnegex 8289 ax-cnre 8291 ax-pre-ltirr 8292 ax-pre-ltwlin 8293 ax-pre-lttrn 8294 ax-pre-ltadd 8296 |
| 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 8363 df-mnf 8364 df-xr 8365 df-ltxr 8366 df-le 8367 df-sub 8501 df-neg 8502 df-inn 9308 df-n0 9569 df-z 9650 |
| This theorem is used by: ztri3or 9692 zrevaddcl 9700 znnsub 9701 nzadd 9702 znn0sub 9715 zneo 9752 zsubcld 9778 eluzsubi 9960 fzen 10458 uzsubsubfz 10463 fzrev 10502 fzrev2 10503 fzrevral2 10524 fzshftral 10526 fz0fzdiffz0 10548 difelfzle 10552 difelfznle 10553 fzo0n 10586 elfzomelpfzo 10660 zmodcl 10796 frecfzen2 10879 facndiv 11193 bccmpl 11208 bcpasc 11220 hashfz 11278 swrdspsleq 11455 pfxccatin12lem4 11514 pfxccatin12lem2a 11515 pfxccatin12lem1 11516 pfxccatin12lem2 11519 swrdccat 11523 moddvds 12585 modmulconst 12609 dvds2sub 12612 dvdssub2 12621 dvdssubr 12625 fzocongeq 12644 3dvds 12650 odd2np1 12659 omoe 12682 omeo 12684 divalgb 12711 divalgmod 12713 ndvdsadd 12717 nn0seqcvgd 12838 congr 12897 cncongr1 12900 cncongr2 12901 prmdiv 13036 prmdiveq 13037 pythagtriplem4 13070 pythagtriplem8 13074 difsqpwdvds 13140 mod2xnegi 13221 bposlem6 16277 gausslemma2dlem6 16352 lgsquadlem1 16362 |
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