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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 1203 | . . 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 10249 | . 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 1004 ∈ wcel 2202 class class class wbr 4088 (class class class)co 6017 ≤ cle 8214 ℤcz 9478 ...cfz 10242 |
| 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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 ax-setind 4635 ax-cnex 8122 ax-resscn 8123 |
| This theorem depends on definitions: df-bi 117 df-3or 1005 df-3an 1006 df-tru 1400 df-fal 1403 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ne 2403 df-ral 2515 df-rex 2516 df-rab 2519 df-v 2804 df-sbc 3032 df-dif 3202 df-un 3204 df-in 3206 df-ss 3213 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-br 4089 df-opab 4151 df-id 4390 df-xp 4731 df-rel 4732 df-cnv 4733 df-co 4734 df-dm 4735 df-iota 5286 df-fun 5328 df-fv 5334 df-ov 6020 df-oprab 6021 df-mpo 6022 df-neg 8352 df-z 9479 df-fz 10243 |
| This theorem is referenced by: fzoun 10417 seqf1oglem1 10780 seqfeq4g 10792 pfxccat3 11314 4sqexercise1 12970 4sqexercise2 12971 4sqlemsdc 12972 gsumfzfsumlemm 14600 lgseisenlem1 15798 lgsquadlem1 15805 gsumgfsumlem 16683 |
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