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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 9504 | . . 3 ⊢ 1 ∈ ℤ | |
| 2 | 1le2 9351 | . . 3 ⊢ 1 ≤ 2 | |
| 3 | eluzuzle 9763 | . . 3 ⊢ ((1 ∈ ℤ ∧ 1 ≤ 2) → (𝐴 ∈ (ℤ≥‘2) → 𝐴 ∈ (ℤ≥‘1))) | |
| 4 | 1, 2, 3 | mp2an 426 | . 2 ⊢ (𝐴 ∈ (ℤ≥‘2) → 𝐴 ∈ (ℤ≥‘1)) |
| 5 | nnuz 9791 | . 2 ⊢ ℕ = (ℤ≥‘1) | |
| 6 | 4, 5 | eleqtrrdi 2325 | 1 ⊢ (𝐴 ∈ (ℤ≥‘2) → 𝐴 ∈ ℕ) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∈ wcel 2202 class class class wbr 4088 ‘cfv 5326 1c1 8032 ≤ cle 8214 ℕcn 9142 2c2 9193 ℤcz 9478 ℤ≥cuz 9754 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 619 ax-in2 620 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-13 2204 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 ax-un 4530 ax-setind 4635 ax-cnex 8122 ax-resscn 8123 ax-1cn 8124 ax-1re 8125 ax-icn 8126 ax-addcl 8127 ax-addrcl 8128 ax-mulcl 8129 ax-addcom 8131 ax-addass 8133 ax-distr 8135 ax-i2m1 8136 ax-0lt1 8137 ax-0id 8139 ax-rnegex 8140 ax-cnre 8142 ax-pre-ltirr 8143 ax-pre-ltwlin 8144 ax-pre-lttrn 8145 ax-pre-ltadd 8147 |
| This theorem depends on definitions: df-bi 117 df-3or 1005 df-3an 1006 df-tru 1400 df-fal 1403 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ne 2403 df-nel 2498 df-ral 2515 df-rex 2516 df-reu 2517 df-rab 2519 df-v 2804 df-sbc 3032 df-dif 3202 df-un 3204 df-in 3206 df-ss 3213 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-int 3929 df-br 4089 df-opab 4151 df-mpt 4152 df-id 4390 df-xp 4731 df-rel 4732 df-cnv 4733 df-co 4734 df-dm 4735 df-rn 4736 df-res 4737 df-ima 4738 df-iota 5286 df-fun 5328 df-fn 5329 df-f 5330 df-fv 5334 df-riota 5970 df-ov 6020 df-oprab 6021 df-mpo 6022 df-pnf 8215 df-mnf 8216 df-xr 8217 df-ltxr 8218 df-le 8219 df-sub 8351 df-neg 8352 df-inn 9143 df-2 9201 df-z 9479 df-uz 9755 |
| This theorem is referenced by: eluz3nn 9800 eluz4nn 9802 eluzge2nn0 9803 eluz2n0 9804 elnn1uz2 9840 zgt1rpn0n1 9929 modm1div 12360 isprm3 12689 isprm4 12690 prmind2 12691 nprm 12694 exprmfct 12709 prmdvdsfz 12710 isprm5lem 12712 isprm6 12718 phibndlem 12787 phibnd 12788 dfphi2 12791 pclemub 12859 pcprendvds2 12863 pcpre1 12864 dvdsprmpweqnn 12908 expnprm 12925 4sqlem15 12977 4sqlem16 12978 infpn2 13076 logbrec 15683 logbgcd1irr 15690 logbgcd1irraplemexp 15691 logbgcd1irraplemap 15692 mersenne 15720 lgsquad2lem2 15810 2sqlem6 15848 |
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