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Mirrors > Home > ILE Home > Th. List > ige2m1fz1 | GIF version |
Description: Membership of an integer greater than 1 decreased by 1 in a 1 based finite set of sequential integers. (Contributed by Alexander van der Vekens, 14-Sep-2018.) |
Ref | Expression |
---|---|
ige2m1fz1 | ⊢ (𝑁 ∈ (ℤ≥‘2) → (𝑁 − 1) ∈ (1...𝑁)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 1e2m1 8967 | . . . 4 ⊢ 1 = (2 − 1) | |
2 | 1 | a1i 9 | . . 3 ⊢ (𝑁 ∈ (ℤ≥‘2) → 1 = (2 − 1)) |
3 | 2 | oveq2d 5852 | . 2 ⊢ (𝑁 ∈ (ℤ≥‘2) → (𝑁 − 1) = (𝑁 − (2 − 1))) |
4 | 2nn 9009 | . . 3 ⊢ 2 ∈ ℕ | |
5 | uzsubsubfz1 9973 | . . 3 ⊢ ((2 ∈ ℕ ∧ 𝑁 ∈ (ℤ≥‘2)) → (𝑁 − (2 − 1)) ∈ (1...𝑁)) | |
6 | 4, 5 | mpan 421 | . 2 ⊢ (𝑁 ∈ (ℤ≥‘2) → (𝑁 − (2 − 1)) ∈ (1...𝑁)) |
7 | 3, 6 | eqeltrd 2241 | 1 ⊢ (𝑁 ∈ (ℤ≥‘2) → (𝑁 − 1) ∈ (1...𝑁)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 = wceq 1342 ∈ wcel 2135 ‘cfv 5182 (class class class)co 5836 1c1 7745 − cmin 8060 ℕcn 8848 2c2 8899 ℤ≥cuz 9457 ...cfz 9935 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1434 ax-7 1435 ax-gen 1436 ax-ie1 1480 ax-ie2 1481 ax-8 1491 ax-10 1492 ax-11 1493 ax-i12 1494 ax-bndl 1496 ax-4 1497 ax-17 1513 ax-i9 1517 ax-ial 1521 ax-i5r 1522 ax-13 2137 ax-14 2138 ax-ext 2146 ax-sep 4094 ax-pow 4147 ax-pr 4181 ax-un 4405 ax-setind 4508 ax-cnex 7835 ax-resscn 7836 ax-1cn 7837 ax-1re 7838 ax-icn 7839 ax-addcl 7840 ax-addrcl 7841 ax-mulcl 7842 ax-addcom 7844 ax-addass 7846 ax-distr 7848 ax-i2m1 7849 ax-0lt1 7850 ax-0id 7852 ax-rnegex 7853 ax-cnre 7855 ax-pre-ltirr 7856 ax-pre-ltwlin 7857 ax-pre-lttrn 7858 ax-pre-ltadd 7860 |
This theorem depends on definitions: df-bi 116 df-3or 968 df-3an 969 df-tru 1345 df-fal 1348 df-nf 1448 df-sb 1750 df-eu 2016 df-mo 2017 df-clab 2151 df-cleq 2157 df-clel 2160 df-nfc 2295 df-ne 2335 df-nel 2430 df-ral 2447 df-rex 2448 df-reu 2449 df-rab 2451 df-v 2723 df-sbc 2947 df-dif 3113 df-un 3115 df-in 3117 df-ss 3124 df-pw 3555 df-sn 3576 df-pr 3577 df-op 3579 df-uni 3784 df-int 3819 df-br 3977 df-opab 4038 df-mpt 4039 df-id 4265 df-xp 4604 df-rel 4605 df-cnv 4606 df-co 4607 df-dm 4608 df-rn 4609 df-res 4610 df-ima 4611 df-iota 5147 df-fun 5184 df-fn 5185 df-f 5186 df-fv 5190 df-riota 5792 df-ov 5839 df-oprab 5840 df-mpo 5841 df-pnf 7926 df-mnf 7927 df-xr 7928 df-ltxr 7929 df-le 7930 df-sub 8062 df-neg 8063 df-inn 8849 df-2 8907 df-n0 9106 df-z 9183 df-uz 9458 df-fz 9936 |
This theorem is referenced by: ige2m1fz 10035 |
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