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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 13121 | . . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀...𝑁) = {𝑗 ∈ ℤ ∣ (𝑀 ≤ 𝑗 ∧ 𝑗 ≤ 𝑁)}) | |
2 | 1 | eleq2d 2824 | . 2 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝐾 ∈ (𝑀...𝑁) ↔ 𝐾 ∈ {𝑗 ∈ ℤ ∣ (𝑀 ≤ 𝑗 ∧ 𝑗 ≤ 𝑁)})) |
3 | breq2 5071 | . . . . 5 ⊢ (𝑗 = 𝐾 → (𝑀 ≤ 𝑗 ↔ 𝑀 ≤ 𝐾)) | |
4 | breq1 5070 | . . . . 5 ⊢ (𝑗 = 𝐾 → (𝑗 ≤ 𝑁 ↔ 𝐾 ≤ 𝑁)) | |
5 | 3, 4 | anbi12d 634 | . . . 4 ⊢ (𝑗 = 𝐾 → ((𝑀 ≤ 𝑗 ∧ 𝑗 ≤ 𝑁) ↔ (𝑀 ≤ 𝐾 ∧ 𝐾 ≤ 𝑁))) |
6 | 5 | elrab 3614 | . . 3 ⊢ (𝐾 ∈ {𝑗 ∈ ℤ ∣ (𝑀 ≤ 𝑗 ∧ 𝑗 ≤ 𝑁)} ↔ (𝐾 ∈ ℤ ∧ (𝑀 ≤ 𝐾 ∧ 𝐾 ≤ 𝑁))) |
7 | 3anass 1097 | . . 3 ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ≤ 𝐾 ∧ 𝐾 ≤ 𝑁) ↔ (𝐾 ∈ ℤ ∧ (𝑀 ≤ 𝐾 ∧ 𝐾 ≤ 𝑁))) | |
8 | 6, 7 | bitr4i 281 | . 2 ⊢ (𝐾 ∈ {𝑗 ∈ ℤ ∣ (𝑀 ≤ 𝑗 ∧ 𝑗 ≤ 𝑁)} ↔ (𝐾 ∈ ℤ ∧ 𝑀 ≤ 𝐾 ∧ 𝐾 ≤ 𝑁)) |
9 | 2, 8 | bitrdi 290 | 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 209 ∧ wa 399 ∧ w3a 1089 = wceq 1543 ∈ wcel 2111 {crab 3066 class class class wbr 5067 (class class class)co 7231 ≤ cle 10892 ℤcz 12200 ...cfz 13119 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2016 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2159 ax-12 2176 ax-ext 2709 ax-sep 5206 ax-nul 5213 ax-pr 5336 ax-cnex 10809 ax-resscn 10810 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2072 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2887 df-ral 3067 df-rex 3068 df-rab 3071 df-v 3422 df-sbc 3709 df-dif 3883 df-un 3885 df-in 3887 df-ss 3897 df-nul 4252 df-if 4454 df-sn 4556 df-pr 4558 df-op 4562 df-uni 4834 df-br 5068 df-opab 5130 df-id 5469 df-xp 5571 df-rel 5572 df-cnv 5573 df-co 5574 df-dm 5575 df-iota 6355 df-fun 6399 df-fv 6405 df-ov 7234 df-oprab 7235 df-mpo 7236 df-neg 11089 df-z 12201 df-fz 13120 |
This theorem is referenced by: elfz 13125 elfz2 13126 fzen 13153 fzaddel 13170 fzadd2 13171 elfzm11 13207 fznn0 13228 phicl2 16345 nndiffz1 30851 fzmul 35662 bccl2d 39760 lcmineqlem11 39807 fz1eqin 40322 jm2.27dlem2 40563 iblspltprt 43217 itgspltprt 43223 |
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