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| Mirrors > Home > ILE Home > Th. List > eluz2b3 | GIF version | ||
| Description: Two ways to say "an integer greater than or equal to 2". (Contributed by Paul Chapman, 23-Nov-2012.) |
| Ref | Expression |
|---|---|
| eluz2b3 | ⊢ (𝑁 ∈ (ℤ≥‘2) ↔ (𝑁 ∈ ℕ ∧ 𝑁 ≠ 1)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eluz2b2 9754 | . 2 ⊢ (𝑁 ∈ (ℤ≥‘2) ↔ (𝑁 ∈ ℕ ∧ 1 < 𝑁)) | |
| 2 | nngt1ne1 9101 | . . 3 ⊢ (𝑁 ∈ ℕ → (1 < 𝑁 ↔ 𝑁 ≠ 1)) | |
| 3 | 2 | pm5.32i 454 | . 2 ⊢ ((𝑁 ∈ ℕ ∧ 1 < 𝑁) ↔ (𝑁 ∈ ℕ ∧ 𝑁 ≠ 1)) |
| 4 | 1, 3 | bitri 184 | 1 ⊢ (𝑁 ∈ (ℤ≥‘2) ↔ (𝑁 ∈ ℕ ∧ 𝑁 ≠ 1)) |
| Colors of variables: wff set class |
| Syntax hints: ∧ wa 104 ↔ wb 105 ∈ wcel 2177 ≠ wne 2377 class class class wbr 4054 ‘cfv 5285 1c1 7956 < clt 8137 ℕcn 9066 2c2 9117 ℤ≥cuz 9678 |
| 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 615 ax-in2 616 ax-io 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-13 2179 ax-14 2180 ax-ext 2188 ax-sep 4173 ax-pow 4229 ax-pr 4264 ax-un 4493 ax-setind 4598 ax-cnex 8046 ax-resscn 8047 ax-1cn 8048 ax-1re 8049 ax-icn 8050 ax-addcl 8051 ax-addrcl 8052 ax-mulcl 8053 ax-addcom 8055 ax-addass 8057 ax-distr 8059 ax-i2m1 8060 ax-0lt1 8061 ax-0id 8063 ax-rnegex 8064 ax-cnre 8066 ax-pre-ltirr 8067 ax-pre-ltwlin 8068 ax-pre-lttrn 8069 ax-pre-ltadd 8071 |
| This theorem depends on definitions: df-bi 117 df-3or 982 df-3an 983 df-tru 1376 df-fal 1379 df-nf 1485 df-sb 1787 df-eu 2058 df-mo 2059 df-clab 2193 df-cleq 2199 df-clel 2202 df-nfc 2338 df-ne 2378 df-nel 2473 df-ral 2490 df-rex 2491 df-reu 2492 df-rab 2494 df-v 2775 df-sbc 3003 df-dif 3172 df-un 3174 df-in 3176 df-ss 3183 df-pw 3623 df-sn 3644 df-pr 3645 df-op 3647 df-uni 3860 df-int 3895 df-br 4055 df-opab 4117 df-mpt 4118 df-id 4353 df-xp 4694 df-rel 4695 df-cnv 4696 df-co 4697 df-dm 4698 df-iota 5246 df-fun 5287 df-fv 5293 df-riota 5917 df-ov 5965 df-oprab 5966 df-mpo 5967 df-pnf 8139 df-mnf 8140 df-xr 8141 df-ltxr 8142 df-le 8143 df-sub 8275 df-neg 8276 df-inn 9067 df-2 9125 df-n0 9326 df-z 9403 df-uz 9679 |
| This theorem is referenced by: 1nuz2 9757 elnn1uz2 9758 nno 12302 ncoprmgcdne1b 12496 isprm2 12524 isprm4 12526 rpexp 12560 dfphi2 12627 dvdsprmpweqnn 12744 expnprm 12761 lgsne0 15600 2sqlem8a 15684 2sqlem8 15685 2sqlem9 15686 |
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