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Mirrors > Home > ILE Home > Th. List > vtocl | GIF version |
Description: Implicit substitution of a class for a setvar variable. (Contributed by NM, 30-Aug-1993.) |
Ref | Expression |
---|---|
vtocl.1 | ⊢ 𝐴 ∈ V |
vtocl.2 | ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜓)) |
vtocl.3 | ⊢ 𝜑 |
Ref | Expression |
---|---|
vtocl | ⊢ 𝜓 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfv 1528 | . 2 ⊢ Ⅎ𝑥𝜓 | |
2 | vtocl.1 | . 2 ⊢ 𝐴 ∈ V | |
3 | vtocl.2 | . 2 ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜓)) | |
4 | vtocl.3 | . 2 ⊢ 𝜑 | |
5 | 1, 2, 3, 4 | vtoclf 2790 | 1 ⊢ 𝜓 |
Colors of variables: wff set class |
Syntax hints: → wi 4 ↔ wb 105 = wceq 1353 ∈ wcel 2148 Vcvv 2737 |
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-5 1447 ax-gen 1449 ax-ie1 1493 ax-ie2 1494 ax-8 1504 ax-4 1510 ax-17 1526 ax-i9 1530 ax-ial 1534 ax-ext 2159 |
This theorem depends on definitions: df-bi 117 df-nf 1461 df-sb 1763 df-clab 2164 df-cleq 2170 df-clel 2173 df-v 2739 |
This theorem is referenced by: vtoclb 2794 zfauscl 4120 bnd2 4170 uniex 4433 ordtriexmid 4516 onsucsssucexmid 4522 regexmid 4530 ordsoexmid 4557 onintexmid 4568 reg3exmid 4575 nnregexmid 4616 acexmidlemv 5866 caovcan 6032 findcard2 6882 findcard2s 6883 inffiexmid 6899 sup3exmid 8890 bj-uniex 14291 bj-omtrans 14330 |
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