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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 1204 | . . 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 10349 | . 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 |
| Syntax hints: → wi 4 ∧ wa 104 ∧ w3a 1005 ∈ wcel 2203 class class class wbr 4109 (class class class)co 6050 ≤ cle 8309 ℤcz 9577 ...cfz 10342 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-14 2206 ax-ext 2214 ax-sep 4228 ax-pow 4287 ax-pr 4322 ax-setind 4659 ax-cnex 8218 ax-resscn 8219 |
| This theorem depends on definitions: df-bi 117 df-3or 1006 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2083 df-mo 2084 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ne 2413 df-ral 2525 df-rex 2526 df-rab 2529 df-v 2815 df-sbc 3043 df-dif 3213 df-un 3215 df-in 3217 df-ss 3224 df-pw 3671 df-sn 3695 df-pr 3696 df-op 3698 df-uni 3915 df-br 4110 df-opab 4172 df-id 4414 df-xp 4755 df-rel 4756 df-cnv 4757 df-co 4758 df-dm 4759 df-iota 5312 df-fun 5354 df-fv 5360 df-ov 6053 df-oprab 6054 df-mpo 6055 df-neg 8447 df-z 9578 df-fz 10343 |
| This theorem is referenced by: fzoun 10517 seqf1oglem1 10881 seqfeq4g 10893 pfxccat3 11426 hashdvds 12918 4sqexercise1 13096 4sqexercise2 13097 4sqlemsdc 13098 gsumfzfsumlemm 14735 lgseisenlem1 15943 lgsquadlem1 15950 gsumgfsumlem 16865 |
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