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| Mirrors > Home > ILE Home > Th. List > eluz2nn | GIF version | ||
| Description: An integer is greater than or equal to 2 is a positive integer. (Contributed by AV, 3-Nov-2018.) |
| Ref | Expression |
|---|---|
| eluz2nn | ⊢ (𝐴 ∈ (ℤ≥‘2) → 𝐴 ∈ ℕ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 1z 9674 | . . 3 ⊢ 1 ∈ ℤ | |
| 2 | 1le2 9517 | . . 3 ⊢ 1 ≤ 2 | |
| 3 | eluzuzle 9939 | . . 3 ⊢ ((1 ∈ ℤ ∧ 1 ≤ 2) → (𝐴 ∈ (ℤ≥‘2) → 𝐴 ∈ (ℤ≥‘1))) | |
| 4 | 1, 2, 3 | mp2an 430 | . 2 ⊢ (𝐴 ∈ (ℤ≥‘2) → 𝐴 ∈ (ℤ≥‘1)) |
| 5 | nnuz 9967 | . 2 ⊢ ℕ = (ℤ≥‘1) | |
| 6 | 4, 5 | eleqtrrdi 2332 | 1 ⊢ (𝐴 ∈ (ℤ≥‘2) → 𝐴 ∈ ℕ) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2209 class class class wbr 4130 ‘cfv 5377 1c1 8180 ≤ cle 8361 ℕcn 9306 2c2 9357 ℤcz 9648 ℤ≥cuz 9930 |
| 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-mpt 4194 df-id 4438 df-xp 4780 df-rel 4781 df-cnv 4782 df-co 4783 df-dm 4784 df-rn 4785 df-res 4786 df-ima 4787 df-iota 5337 df-fun 5379 df-fn 5380 df-f 5381 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-2 9365 df-z 9649 df-uz 9931 |
| This theorem is used by: eluz3nn 9976 eluz4nn 9978 eluzge2nn0 9979 eluz2n0 9980 elnn1uz2 10016 zgt1rpn0n1 10106 modm1div 12583 isprm3 12912 isprm4 12913 prmind2 12914 nprm 12917 exprmfct 12933 prmdvdsfz 12934 isprm5lem 12936 isprm6 12942 pwbdvds 12961 pwbdvdseu 12963 nnmaxpwlemxy 12964 nnmaxpwlemnfac 12967 nnmaxpwlemparts 12968 nnmaxpw 12969 phibndlem 13014 phibnd 13015 dfphi2 13018 pclemub 13086 pcprendvds2 13090 pcpre1 13091 dvdsprmpweqnn 13135 expnprm 13152 4sqlem15 13204 4sqlem16 13205 infpn2 13396 logfac 16048 logbrec 16115 logbgcd1irr 16122 logbgcd1irraplemexp 16123 logbgcd1irraplemap 16124 mersenne 16195 bposlem3 16211 lgsquad2lem2 16299 2sqlem6 16337 |
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