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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 13458 | . . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀...𝑁) = {𝑗 ∈ ℤ ∣ (𝑀 ≤ 𝑗 ∧ 𝑗 ≤ 𝑁)}) | |
| 2 | 1 | eleq2d 2823 | . 2 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝐾 ∈ (𝑀...𝑁) ↔ 𝐾 ∈ {𝑗 ∈ ℤ ∣ (𝑀 ≤ 𝑗 ∧ 𝑗 ≤ 𝑁)})) |
| 3 | breq2 5090 | . . . . 5 ⊢ (𝑗 = 𝐾 → (𝑀 ≤ 𝑗 ↔ 𝑀 ≤ 𝐾)) | |
| 4 | breq1 5089 | . . . . 5 ⊢ (𝑗 = 𝐾 → (𝑗 ≤ 𝑁 ↔ 𝐾 ≤ 𝑁)) | |
| 5 | 3, 4 | anbi12d 633 | . . . 4 ⊢ (𝑗 = 𝐾 → ((𝑀 ≤ 𝑗 ∧ 𝑗 ≤ 𝑁) ↔ (𝑀 ≤ 𝐾 ∧ 𝐾 ≤ 𝑁))) |
| 6 | 5 | elrab 3635 | . . 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 1542 ∈ wcel 2114 {crab 3390 class class class wbr 5086 (class class class)co 7362 ≤ cle 11175 ℤcz 12519 ...cfz 13456 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5232 ax-pr 5372 ax-cnex 11089 ax-resscn 11090 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ral 3053 df-rex 3063 df-rab 3391 df-v 3432 df-sbc 3730 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-br 5087 df-opab 5149 df-id 5521 df-xp 5632 df-rel 5633 df-cnv 5634 df-co 5635 df-dm 5636 df-iota 6450 df-fun 6496 df-fv 6502 df-ov 7365 df-oprab 7366 df-mpo 7367 df-neg 11375 df-z 12520 df-fz 13457 |
| This theorem is referenced by: elfz 13462 elfz2 13463 fzen 13490 fzaddel 13507 fzadd2 13508 elfzm11 13544 fznn0 13568 phicl2 16733 nndiffz1 32878 fzmul 38082 bccl2d 42450 lcmineqlem11 42498 fz1eqin 43221 jm2.27dlem2 43462 fzunt 43906 fzuntd 43907 fzunt1d 43908 fzuntgd 43909 iblspltprt 46425 itgspltprt 46431 natglobalincr 47329 |
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