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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 3014 | . 2 ⊢ (𝑁 ∈ ℤ → ([𝑁 / 𝑘]𝜑 ↔ ∀𝑘(𝑘 = 𝑁 → 𝜑))) | |
| 2 | df-ral 2480 | . . 3 ⊢ (∀𝑘 ∈ (𝑁...𝑁)𝜑 ↔ ∀𝑘(𝑘 ∈ (𝑁...𝑁) → 𝜑)) | |
| 3 | elfz1eq 10110 | . . . . . 6 ⊢ (𝑘 ∈ (𝑁...𝑁) → 𝑘 = 𝑁) | |
| 4 | elfz3 10109 | . . . . . . 7 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ (𝑁...𝑁)) | |
| 5 | eleq1 2259 | . . . . . . 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 1838 | . . 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 1362 = wceq 1364 ∈ wcel 2167 ∀wral 2475 [wsbc 2989 (class class class)co 5922 ℤcz 9326 ...cfz 10083 |
| 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 615 ax-in2 616 ax-io 710 ax-5 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-13 2169 ax-14 2170 ax-ext 2178 ax-sep 4151 ax-pow 4207 ax-pr 4242 ax-un 4468 ax-setind 4573 ax-cnex 7970 ax-resscn 7971 ax-pre-ltirr 7991 ax-pre-apti 7994 |
| This theorem depends on definitions: df-bi 117 df-3or 981 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1475 df-sb 1777 df-eu 2048 df-mo 2049 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-ne 2368 df-nel 2463 df-ral 2480 df-rex 2481 df-rab 2484 df-v 2765 df-sbc 2990 df-dif 3159 df-un 3161 df-in 3163 df-ss 3170 df-pw 3607 df-sn 3628 df-pr 3629 df-op 3631 df-uni 3840 df-br 4034 df-opab 4095 df-mpt 4096 df-id 4328 df-xp 4669 df-rel 4670 df-cnv 4671 df-co 4672 df-dm 4673 df-rn 4674 df-res 4675 df-ima 4676 df-iota 5219 df-fun 5260 df-fn 5261 df-f 5262 df-fv 5266 df-ov 5925 df-oprab 5926 df-mpo 5927 df-pnf 8063 df-mnf 8064 df-xr 8065 df-ltxr 8066 df-le 8067 df-neg 8200 df-z 9327 df-uz 9602 df-fz 10084 |
| This theorem is referenced by: (None) |
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