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Mirrors > Home > ILE Home > Th. List > vtoclg1f | GIF version |
Description: Version of vtoclgf 2788 with one nonfreeness hypothesis replaced with a disjoint variable condition, thus avoiding dependency on ax-11 1499 and ax-13 2143. (Contributed by BJ, 1-May-2019.) |
Ref | Expression |
---|---|
vtoclg1f.nf | ⊢ Ⅎ𝑥𝜓 |
vtoclg1f.maj | ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜓)) |
vtoclg1f.min | ⊢ 𝜑 |
Ref | Expression |
---|---|
vtoclg1f | ⊢ (𝐴 ∈ 𝑉 → 𝜓) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elex 2741 | . 2 ⊢ (𝐴 ∈ 𝑉 → 𝐴 ∈ V) | |
2 | isset 2736 | . . 3 ⊢ (𝐴 ∈ V ↔ ∃𝑥 𝑥 = 𝐴) | |
3 | vtoclg1f.nf | . . . 4 ⊢ Ⅎ𝑥𝜓 | |
4 | vtoclg1f.min | . . . . 5 ⊢ 𝜑 | |
5 | vtoclg1f.maj | . . . . 5 ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜓)) | |
6 | 4, 5 | mpbii 147 | . . . 4 ⊢ (𝑥 = 𝐴 → 𝜓) |
7 | 3, 6 | exlimi 1587 | . . 3 ⊢ (∃𝑥 𝑥 = 𝐴 → 𝜓) |
8 | 2, 7 | sylbi 120 | . 2 ⊢ (𝐴 ∈ V → 𝜓) |
9 | 1, 8 | syl 14 | 1 ⊢ (𝐴 ∈ 𝑉 → 𝜓) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ↔ wb 104 = wceq 1348 Ⅎwnf 1453 ∃wex 1485 ∈ wcel 2141 Vcvv 2730 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-5 1440 ax-gen 1442 ax-ie1 1486 ax-ie2 1487 ax-8 1497 ax-4 1503 ax-17 1519 ax-i9 1523 ax-ial 1527 ax-ext 2152 |
This theorem depends on definitions: df-bi 116 df-nf 1454 df-sb 1756 df-clab 2157 df-cleq 2163 df-clel 2166 df-v 2732 |
This theorem is referenced by: opeliunxp2f 6217 summodclem2a 11344 fprodsplit1f 11597 |
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