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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 13569 | . . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀...𝑁) = {𝑗 ∈ ℤ ∣ (𝑀 ≤ 𝑗 ∧ 𝑗 ≤ 𝑁)}) | |
2 | 1 | eleq2d 2830 | . 2 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝐾 ∈ (𝑀...𝑁) ↔ 𝐾 ∈ {𝑗 ∈ ℤ ∣ (𝑀 ≤ 𝑗 ∧ 𝑗 ≤ 𝑁)})) |
3 | breq2 5170 | . . . . 5 ⊢ (𝑗 = 𝐾 → (𝑀 ≤ 𝑗 ↔ 𝑀 ≤ 𝐾)) | |
4 | breq1 5169 | . . . . 5 ⊢ (𝑗 = 𝐾 → (𝑗 ≤ 𝑁 ↔ 𝐾 ≤ 𝑁)) | |
5 | 3, 4 | anbi12d 631 | . . . 4 ⊢ (𝑗 = 𝐾 → ((𝑀 ≤ 𝑗 ∧ 𝑗 ≤ 𝑁) ↔ (𝑀 ≤ 𝐾 ∧ 𝐾 ≤ 𝑁))) |
6 | 5 | elrab 3708 | . . 3 ⊢ (𝐾 ∈ {𝑗 ∈ ℤ ∣ (𝑀 ≤ 𝑗 ∧ 𝑗 ≤ 𝑁)} ↔ (𝐾 ∈ ℤ ∧ (𝑀 ≤ 𝐾 ∧ 𝐾 ≤ 𝑁))) |
7 | 3anass 1095 | . . 3 ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ≤ 𝐾 ∧ 𝐾 ≤ 𝑁) ↔ (𝐾 ∈ ℤ ∧ (𝑀 ≤ 𝐾 ∧ 𝐾 ≤ 𝑁))) | |
8 | 6, 7 | bitr4i 278 | . 2 ⊢ (𝐾 ∈ {𝑗 ∈ ℤ ∣ (𝑀 ≤ 𝑗 ∧ 𝑗 ≤ 𝑁)} ↔ (𝐾 ∈ ℤ ∧ 𝑀 ≤ 𝐾 ∧ 𝐾 ≤ 𝑁)) |
9 | 2, 8 | bitrdi 287 | 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 206 ∧ wa 395 ∧ w3a 1087 = wceq 1537 ∈ wcel 2108 {crab 3443 class class class wbr 5166 (class class class)co 7448 ≤ cle 11325 ℤcz 12639 ...cfz 13567 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1793 ax-4 1807 ax-5 1909 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2158 ax-12 2178 ax-ext 2711 ax-sep 5317 ax-nul 5324 ax-pr 5447 ax-cnex 11240 ax-resscn 11241 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 847 df-3or 1088 df-3an 1089 df-tru 1540 df-fal 1550 df-ex 1778 df-nf 1782 df-sb 2065 df-mo 2543 df-eu 2572 df-clab 2718 df-cleq 2732 df-clel 2819 df-nfc 2895 df-ral 3068 df-rex 3077 df-rab 3444 df-v 3490 df-sbc 3805 df-dif 3979 df-un 3981 df-in 3983 df-ss 3993 df-nul 4353 df-if 4549 df-pw 4624 df-sn 4649 df-pr 4651 df-op 4655 df-uni 4932 df-br 5167 df-opab 5229 df-id 5593 df-xp 5706 df-rel 5707 df-cnv 5708 df-co 5709 df-dm 5710 df-iota 6525 df-fun 6575 df-fv 6581 df-ov 7451 df-oprab 7452 df-mpo 7453 df-neg 11523 df-z 12640 df-fz 13568 |
This theorem is referenced by: elfz 13573 elfz2 13574 fzen 13601 fzaddel 13618 fzadd2 13619 elfzm11 13655 fznn0 13676 phicl2 16815 nndiffz1 32791 fzmul 37701 bccl2d 41948 lcmineqlem11 41996 fz1eqin 42725 jm2.27dlem2 42967 fzunt 43417 fzuntd 43418 fzunt1d 43419 fzuntgd 43420 iblspltprt 45894 itgspltprt 45900 natglobalincr 46796 |
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