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| Mirrors > Home > ILE Home > Th. List > nnzi | GIF version | ||
| Description: A positive integer is an integer. (Contributed by Mario Carneiro, 18-Feb-2014.) |
| Ref | Expression |
|---|---|
| nnzi.1 | ⊢ 𝑁 ∈ ℕ |
| Ref | Expression |
|---|---|
| nnzi | ⊢ 𝑁 ∈ ℤ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nnssz 9665 | . 2 ⊢ ℕ ⊆ ℤ | |
| 2 | nnzi.1 | . 2 ⊢ 𝑁 ∈ ℕ | |
| 3 | 1, 2 | sselii 3245 | 1 ⊢ 𝑁 ∈ ℤ |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: ∈ wcel 2209 ℕcn 9306 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-z 9649 |
| This theorem is used by: 1z 9674 2z 9676 3z 9677 4z 9678 5eluz3 9970 3dvds 12647 3dvdsdec 12648 ndvdsi 12716 6gcd4e2 12788 3lcm2e6woprm 12880 6lcm4e12 12881 3lcm2e6 12955 prm23ge5 13063 pockthi 13157 modxai 13215 mod2xnegi 13218 gcdmodi 13221 prmlem1 13242 prmlem2 13254 ballotfilemofi 13268 ballotfilem1 13269 ballotfilemonn 13270 ballotfilem2 13277 ballotfilemfmpn 13283 ballotfilemefi 13286 ballotfilemodife 13289 ballotfilemiex 13293 ballotfilemsval 13301 ballotfilemsdom 13304 ballotfilemsel1i 13305 ballotfilemsima 13308 ballotfilemrval 13310 ballotfilemfrceq 13321 ballotfilemfrcn0 13322 bassetsnn 13458 strleun 13507 strle1g 13509 2logb9irr 16126 2logb9irrap 16132 birthdaylog2 16147 ppiublem1 16192 ppiublem2 16193 ppiqub 16194 bpos1lem 16207 lgsval 16221 lgsfvalg 16222 lgsfcl2 16223 lgsval2lem 16227 lgsdir2lem5 16249 lgsdir2 16250 lgsne0 16255 2lgs 16321 2lgsoddprmlem2 16323 2lgsoddprm 16330 ex-dvds 16842 ex-gcd 16843 |
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