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Mirrors > Home > ILE Home > Th. List > vtoclga | GIF version |
Description: Implicit substitution of a class for a setvar variable. (Contributed by NM, 20-Aug-1995.) |
Ref | Expression |
---|---|
vtoclga.1 | ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜓)) |
vtoclga.2 | ⊢ (𝑥 ∈ 𝐵 → 𝜑) |
Ref | Expression |
---|---|
vtoclga | ⊢ (𝐴 ∈ 𝐵 → 𝜓) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfcv 2219 | . 2 ⊢ Ⅎ𝑥𝐴 | |
2 | nfv 1461 | . 2 ⊢ Ⅎ𝑥𝜓 | |
3 | vtoclga.1 | . 2 ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜓)) | |
4 | vtoclga.2 | . 2 ⊢ (𝑥 ∈ 𝐵 → 𝜑) | |
5 | 1, 2, 3, 4 | vtoclgaf 2663 | 1 ⊢ (𝐴 ∈ 𝐵 → 𝜓) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ↔ wb 103 = wceq 1284 ∈ wcel 1433 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-io 662 ax-5 1376 ax-7 1377 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-8 1435 ax-10 1436 ax-11 1437 ax-i12 1438 ax-bndl 1439 ax-4 1440 ax-17 1459 ax-i9 1463 ax-ial 1467 ax-i5r 1468 ax-ext 2063 |
This theorem depends on definitions: df-bi 115 df-tru 1287 df-nf 1390 df-sb 1686 df-clab 2068 df-cleq 2074 df-clel 2077 df-nfc 2208 df-v 2603 |
This theorem is referenced by: vtoclri 2673 ssuni 3623 ordtriexmid 4265 onsucsssucexmid 4270 tfis3 4327 fvmpt3 5272 fvmptssdm 5276 fnressn 5370 fressnfv 5371 caovord 5692 caovimo 5714 tfrlem1 5946 freccl 6016 nnacl 6082 nnmcl 6083 nnacom 6086 nnaass 6087 nndi 6088 nnmass 6089 nnmsucr 6090 nnmcom 6091 nnsucsssuc 6094 nntri3or 6095 nnaordi 6104 nnaword 6107 nnmordi 6112 nnaordex 6123 findcard 6372 findcard2 6373 findcard2s 6374 indpi 6532 prarloclem3 6687 uzind4s2 8679 cnref1o 8733 frec2uzrdg 9411 expcl2lemap 9488 climub 10182 climserile 10183 ialginv 10429 ialgcvg 10430 ialgcvga 10433 ialgfx 10434 prmind2 10502 |
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