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| Mirrors > Home > ILE Home > Th. List > elfzd | GIF version | ||
| Description: Membership in a finite set of sequential integers. (Contributed by Glauco Siliprandi, 23-Oct-2021.) |
| Ref | Expression |
|---|---|
| elfzd.1 | ⊢ (𝜑 → 𝑀 ∈ ℤ) |
| elfzd.2 | ⊢ (𝜑 → 𝑁 ∈ ℤ) |
| elfzd.3 | ⊢ (𝜑 → 𝐾 ∈ ℤ) |
| elfzd.4 | ⊢ (𝜑 → 𝑀 ≤ 𝐾) |
| elfzd.5 | ⊢ (𝜑 → 𝐾 ≤ 𝑁) |
| Ref | Expression |
|---|---|
| elfzd | ⊢ (𝜑 → 𝐾 ∈ (𝑀...𝑁)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elfzd.1 | . . . 4 ⊢ (𝜑 → 𝑀 ∈ ℤ) | |
| 2 | elfzd.2 | . . . 4 ⊢ (𝜑 → 𝑁 ∈ ℤ) | |
| 3 | elfzd.3 | . . . 4 ⊢ (𝜑 → 𝐾 ∈ ℤ) | |
| 4 | 1, 2, 3 | 3jca 1208 | . . 3 ⊢ (𝜑 → (𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ)) |
| 5 | elfzd.4 | . . 3 ⊢ (𝜑 → 𝑀 ≤ 𝐾) | |
| 6 | elfzd.5 | . . 3 ⊢ (𝜑 → 𝐾 ≤ 𝑁) | |
| 7 | 4, 5, 6 | jca32 310 | . 2 ⊢ (𝜑 → ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ∧ (𝑀 ≤ 𝐾 ∧ 𝐾 ≤ 𝑁))) |
| 8 | elfz2 10418 | . 2 ⊢ (𝐾 ∈ (𝑀...𝑁) ↔ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ∧ (𝑀 ≤ 𝐾 ∧ 𝐾 ≤ 𝑁))) | |
| 9 | 7, 8 | sylibr 134 | 1 ⊢ (𝜑 → 𝐾 ∈ (𝑀...𝑁)) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 104 ∧ w3a 1009 ∈ wcel 2209 class class class wbr 4130 (class class class)co 6085 ≤ cle 8361 ℤcz 9644 ...cfz 10411 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4249 ax-pow 4311 ax-pr 4346 ax-setind 4684 ax-cnex 8270 ax-resscn 8271 |
| This proof depends on definitions: df-bi 117 df-3or 1010 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-ral 2533 df-rex 2534 df-rab 2537 df-v 2823 df-sbc 3052 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-br 4131 df-opab 4193 df-id 4438 df-xp 4780 df-rel 4781 df-cnv 4782 df-co 4783 df-dm 4784 df-iota 5337 df-fun 5379 df-fv 5385 df-ov 6088 df-oprab 6089 df-mpo 6090 df-neg 8500 df-z 9645 df-fz 10412 |
| This theorem is used by: fzoun 10590 seqf1oglem1 10956 seqfeq4g 10968 pfxccat3 11506 hashdvds 12999 4sqexercise1 13177 4sqexercise2 13178 4sqlemsdc 13179 ballotfilemsdom 13255 ballotfilemsel1i 13256 ballotfilemsima 13259 ballotfilemfrcn0 13273 gzsumshift 14149 lgseisenlem1 16189 lgsquadlem1 16196 |
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