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| Mirrors > Home > ILE Home > Th. List > fz1sbc | GIF version | ||
| Description: Quantification over a one-member finite set of sequential integers in terms of substitution. (Contributed by NM, 28-Nov-2005.) |
| Ref | Expression |
|---|---|
| fz1sbc | ⊢ (𝑁 ∈ ℤ → (∀𝑘 ∈ (𝑁...𝑁)𝜑 ↔ [𝑁 / 𝑘]𝜑)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sbc6g 3053 | . 2 ⊢ (𝑁 ∈ ℤ → ([𝑁 / 𝑘]𝜑 ↔ ∀𝑘(𝑘 = 𝑁 → 𝜑))) | |
| 2 | df-ral 2513 | . . 3 ⊢ (∀𝑘 ∈ (𝑁...𝑁)𝜑 ↔ ∀𝑘(𝑘 ∈ (𝑁...𝑁) → 𝜑)) | |
| 3 | elfz1eq 10231 | . . . . . 6 ⊢ (𝑘 ∈ (𝑁...𝑁) → 𝑘 = 𝑁) | |
| 4 | elfz3 10230 | . . . . . . 7 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ (𝑁...𝑁)) | |
| 5 | eleq1 2292 | . . . . . . 7 ⊢ (𝑘 = 𝑁 → (𝑘 ∈ (𝑁...𝑁) ↔ 𝑁 ∈ (𝑁...𝑁))) | |
| 6 | 4, 5 | syl5ibrcom 157 | . . . . . 6 ⊢ (𝑁 ∈ ℤ → (𝑘 = 𝑁 → 𝑘 ∈ (𝑁...𝑁))) |
| 7 | 3, 6 | impbid2 143 | . . . . 5 ⊢ (𝑁 ∈ ℤ → (𝑘 ∈ (𝑁...𝑁) ↔ 𝑘 = 𝑁)) |
| 8 | 7 | imbi1d 231 | . . . 4 ⊢ (𝑁 ∈ ℤ → ((𝑘 ∈ (𝑁...𝑁) → 𝜑) ↔ (𝑘 = 𝑁 → 𝜑))) |
| 9 | 8 | albidv 1870 | . . 3 ⊢ (𝑁 ∈ ℤ → (∀𝑘(𝑘 ∈ (𝑁...𝑁) → 𝜑) ↔ ∀𝑘(𝑘 = 𝑁 → 𝜑))) |
| 10 | 2, 9 | bitr2id 193 | . 2 ⊢ (𝑁 ∈ ℤ → (∀𝑘(𝑘 = 𝑁 → 𝜑) ↔ ∀𝑘 ∈ (𝑁...𝑁)𝜑)) |
| 11 | 1, 10 | bitr2d 189 | 1 ⊢ (𝑁 ∈ ℤ → (∀𝑘 ∈ (𝑁...𝑁)𝜑 ↔ [𝑁 / 𝑘]𝜑)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ↔ wb 105 ∀wal 1393 = wceq 1395 ∈ wcel 2200 ∀wral 2508 [wsbc 3028 (class class class)co 6001 ℤcz 9446 ...cfz 10204 |
| 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 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-sep 4202 ax-pow 4258 ax-pr 4293 ax-un 4524 ax-setind 4629 ax-cnex 8090 ax-resscn 8091 ax-pre-ltirr 8111 ax-pre-apti 8114 |
| This theorem depends on definitions: df-bi 117 df-3or 1003 df-3an 1004 df-tru 1398 df-fal 1401 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ne 2401 df-nel 2496 df-ral 2513 df-rex 2514 df-rab 2517 df-v 2801 df-sbc 3029 df-dif 3199 df-un 3201 df-in 3203 df-ss 3210 df-pw 3651 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3889 df-br 4084 df-opab 4146 df-mpt 4147 df-id 4384 df-xp 4725 df-rel 4726 df-cnv 4727 df-co 4728 df-dm 4729 df-rn 4730 df-res 4731 df-ima 4732 df-iota 5278 df-fun 5320 df-fn 5321 df-f 5322 df-fv 5326 df-ov 6004 df-oprab 6005 df-mpo 6006 df-pnf 8183 df-mnf 8184 df-xr 8185 df-ltxr 8186 df-le 8187 df-neg 8320 df-z 9447 df-uz 9723 df-fz 10205 |
| This theorem is referenced by: (None) |
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