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Mirrors > Home > MPE Home > Th. List > elfz1 | Structured version Visualization version GIF version |
Description: Membership in a finite set of sequential integers. (Contributed by NM, 21-Jul-2005.) |
Ref | Expression |
---|---|
elfz1 | ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝐾 ∈ (𝑀...𝑁) ↔ (𝐾 ∈ ℤ ∧ 𝑀 ≤ 𝐾 ∧ 𝐾 ≤ 𝑁))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fzval 12578 | . . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀...𝑁) = {𝑗 ∈ ℤ ∣ (𝑀 ≤ 𝑗 ∧ 𝑗 ≤ 𝑁)}) | |
2 | 1 | eleq2d 2862 | . 2 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝐾 ∈ (𝑀...𝑁) ↔ 𝐾 ∈ {𝑗 ∈ ℤ ∣ (𝑀 ≤ 𝑗 ∧ 𝑗 ≤ 𝑁)})) |
3 | breq2 4845 | . . . . 5 ⊢ (𝑗 = 𝐾 → (𝑀 ≤ 𝑗 ↔ 𝑀 ≤ 𝐾)) | |
4 | breq1 4844 | . . . . 5 ⊢ (𝑗 = 𝐾 → (𝑗 ≤ 𝑁 ↔ 𝐾 ≤ 𝑁)) | |
5 | 3, 4 | anbi12d 625 | . . . 4 ⊢ (𝑗 = 𝐾 → ((𝑀 ≤ 𝑗 ∧ 𝑗 ≤ 𝑁) ↔ (𝑀 ≤ 𝐾 ∧ 𝐾 ≤ 𝑁))) |
6 | 5 | elrab 3554 | . . 3 ⊢ (𝐾 ∈ {𝑗 ∈ ℤ ∣ (𝑀 ≤ 𝑗 ∧ 𝑗 ≤ 𝑁)} ↔ (𝐾 ∈ ℤ ∧ (𝑀 ≤ 𝐾 ∧ 𝐾 ≤ 𝑁))) |
7 | 3anass 1117 | . . 3 ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ≤ 𝐾 ∧ 𝐾 ≤ 𝑁) ↔ (𝐾 ∈ ℤ ∧ (𝑀 ≤ 𝐾 ∧ 𝐾 ≤ 𝑁))) | |
8 | 6, 7 | bitr4i 270 | . 2 ⊢ (𝐾 ∈ {𝑗 ∈ ℤ ∣ (𝑀 ≤ 𝑗 ∧ 𝑗 ≤ 𝑁)} ↔ (𝐾 ∈ ℤ ∧ 𝑀 ≤ 𝐾 ∧ 𝐾 ≤ 𝑁)) |
9 | 2, 8 | syl6bb 279 | 1 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝐾 ∈ (𝑀...𝑁) ↔ (𝐾 ∈ ℤ ∧ 𝑀 ≤ 𝐾 ∧ 𝐾 ≤ 𝑁))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 198 ∧ wa 385 ∧ w3a 1108 = wceq 1653 ∈ wcel 2157 {crab 3091 class class class wbr 4841 (class class class)co 6876 ≤ cle 10362 ℤcz 11662 ...cfz 12576 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1891 ax-4 1905 ax-5 2006 ax-6 2072 ax-7 2107 ax-9 2166 ax-10 2185 ax-11 2200 ax-12 2213 ax-13 2354 ax-ext 2775 ax-sep 4973 ax-nul 4981 ax-pr 5095 ax-cnex 10278 ax-resscn 10279 |
This theorem depends on definitions: df-bi 199 df-an 386 df-or 875 df-3or 1109 df-3an 1110 df-tru 1657 df-ex 1876 df-nf 1880 df-sb 2065 df-mo 2590 df-eu 2607 df-clab 2784 df-cleq 2790 df-clel 2793 df-nfc 2928 df-ral 3092 df-rex 3093 df-rab 3096 df-v 3385 df-sbc 3632 df-dif 3770 df-un 3772 df-in 3774 df-ss 3781 df-nul 4114 df-if 4276 df-sn 4367 df-pr 4369 df-op 4373 df-uni 4627 df-br 4842 df-opab 4904 df-id 5218 df-xp 5316 df-rel 5317 df-cnv 5318 df-co 5319 df-dm 5320 df-iota 6062 df-fun 6101 df-fv 6107 df-ov 6879 df-oprab 6880 df-mpt2 6881 df-neg 10557 df-z 11663 df-fz 12577 |
This theorem is referenced by: elfz 12582 elfz2 12583 fzen 12608 fzaddel 12625 fzadd2 12626 elfzm11 12661 fznn0 12682 phicl2 15803 nndiffz1 30058 fzmul 34016 fz1eqin 38106 jm2.27dlem2 38350 iblspltprt 40920 itgspltprt 40926 |
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