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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 9679 | . . 3 ⊢ 1 ∈ ℤ | |
| 2 | 1le2 9524 | . . 3 ⊢ 1 ≤ 2 | |
| 3 | eluzuzle 9945 | . . 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 9973 | . 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 4131 ‘cfv 5380 1c1 8186 ≤ cle 8367 ℕcn 9313 2c2 9364 ℤcz 9653 ℤ≥cuz 9936 |
| 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-mpt 4195 df-id 4440 df-xp 4782 df-rel 4783 df-cnv 4784 df-co 4785 df-dm 4786 df-rn 4787 df-res 4788 df-ima 4789 df-iota 5340 df-fun 5382 df-fn 5383 df-f 5384 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-2 9372 df-z 9654 df-uz 9937 |
| This theorem is used by: eluz3nn 9982 eluz4nn 9984 eluzge2nn0 9985 eluz2n0 9986 elnn1uz2 10022 zgt1rpn0n1 10112 modm1div 12591 isprm3 12920 isprm4 12921 prmind2 12922 nprm 12925 exprmfct 12941 prmdvdsfz 12942 isprm5lem 12944 isprm6 12950 pwbdvds 12969 pwbdvdseu 12971 nnmaxpwlemxy 12972 nnmaxpwlemnfac 12975 nnmaxpwlemparts 12976 nnmaxpw 12977 phibndlem 13022 phibnd 13023 dfphi2 13026 pclemub 13094 pcprendvds2 13098 pcpre1 13099 dvdsprmpweqnn 13143 expnprm 13160 4sqlem15 13212 4sqlem16 13213 infpn2 13404 logfac 16143 logbrec 16213 logbgcd1irr 16220 logbgcd1irraplemexp 16221 logbgcd1irraplemap 16222 mersenne 16314 bposlem3 16330 lgsquad2lem2 16423 2sqlem6 16461 |
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