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| Mirrors > Home > ILE Home > Th. List > vtoclg | GIF version | ||
| Description: Implicit substitution of a class expression for a setvar variable. (Contributed by NM, 17-Apr-1995.) |
| Ref | Expression |
|---|---|
| vtoclg.1 | ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜓)) |
| vtoclg.2 | ⊢ 𝜑 |
| Ref | Expression |
|---|---|
| vtoclg | ⊢ (𝐴 ∈ 𝑉 → 𝜓) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nfcv 2392 | . 2 ⊢ Ⅎ𝑥𝐴 | |
| 2 | nfv 1581 | . 2 ⊢ Ⅎ𝑥𝜓 | |
| 3 | vtoclg.1 | . 2 ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜓)) | |
| 4 | vtoclg.2 | . 2 ⊢ 𝜑 | |
| 5 | 1, 2, 3, 4 | vtoclgf 2881 | 1 ⊢ (𝐴 ∈ 𝑉 → 𝜓) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 105 = wceq 1402 ∈ wcel 2209 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 |
| This proof depends on definitions: df-bi 117 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-v 2823 |
| This theorem is used by: vtoclbg 2884 ceqex 2953 mo2icl 3005 nelrdva 3033 sbctt 3118 sbcnestgf 3199 csbing 3438 ifmdc 3683 prnzg 3838 sneqrg 3887 unisng 3952 csbopabg 4209 trss 4238 sepg 4251 inex1g 4269 ssexg 4272 pwexg 4317 prexg 4349 opth 4377 ordelord 4526 uniexg 4585 vtoclr 4823 resieq 5073 csbima12g 5148 dmsnsnsng 5265 iotaexab 5356 iota5 5359 csbiotag 5370 funmo 5392 fconstg 5589 funfveu 5708 funbrfv 5739 fnbrfvb 5741 fvelimab 5759 ssimaexg 5765 fvelrn 5839 isoselem 6026 csbriotag 6052 csbov123g 6124 ovg 6228 tfrexlem 6605 rdg0g 6659 ensn1g 7084 fundmeng 7095 xpdom2g 7130 phplem3g 7157 prcdnql 7851 prcunqu 7852 prdisj 7859 shftvalg 11601 shftval4g 11602 climshft 12070 telfsumo 12233 fsumparts 12237 lcmgcdlem 12855 fiinopn 15105 bdsepg 16916 bdinex1g 16927 bdssexg 16930 bj-prexg 16937 bj-uniexg 16944 |
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