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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 9672 | . 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 9313 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-z 9656 |
| This theorem is used by: 1z 9681 2z 9683 3z 9684 4z 9685 5eluz3 9977 3dvds 12656 3dvdsdec 12657 ndvdsi 12725 6gcd4e2 12797 3lcm2e6woprm 12889 6lcm4e12 12890 3lcm2e6 12964 prm23ge5 13072 pockthi 13166 modxai 13224 mod2xnegi 13227 gcdmodi 13230 prmlem1 13251 prmlem2 13263 ballotfilemofi 13277 ballotfilem1 13278 ballotfilemonn 13279 ballotfilem2 13286 ballotfilemfmpn 13292 ballotfilemefi 13295 ballotfilemodife 13298 ballotfilemiex 13302 ballotfilemsval 13310 ballotfilemsdom 13313 ballotfilemsel1i 13314 ballotfilemsima 13317 ballotfilemrval 13319 ballotfilemfrceq 13330 ballotfilemfrcn0 13331 bassetsnn 13467 strleun 13517 strle1g 13519 2logb9irr 16207 2logb9irrap 16213 birthdaylog2 16228 ppiublem1 16291 ppiublem2 16292 ppiqub 16293 bpos1lem 16309 bposlem6 16316 bposlem8 16318 bposlem9 16319 lgsval 16328 lgsfvalg 16329 lgsfcl2 16330 lgsval2lem 16334 lgsdir2lem5 16356 lgsdir2 16357 lgsne0 16362 2lgs 16428 2lgsoddprmlem2 16430 2lgsoddprm 16437 ex-dvds 16949 ex-gcd 16950 |
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