| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 4210 trss 4240 sepg 4253 inex1g 4271 ssexg 4274 pwexg 4319 prexg 4351 opth 4379 ordelord 4528 uniexg 4587 vtoclr 4825 resieq 5075 csbima12g 5151 dmsnsnsng 5268 iotaexab 5359 iota5 5362 csbiotag 5373 funmo 5395 fconstg 5592 funfveu 5711 funbrfv 5742 fnbrfvb 5744 fvelimab 5762 ssimaexg 5768 fvelrn 5842 isoselem 6029 csbriotag 6055 csbov123g 6127 ovg 6231 tfrexlem 6609 rdg0g 6663 ensn1g 7088 fundmeng 7099 xpdom2g 7134 phplem3g 7161 prcdnql 7857 prcunqu 7858 prdisj 7865 shftvalg 11623 shftval4g 11624 climshft 12095 telfsumo 12258 fsumparts 12262 lcmgcdlem 12880 fiinopn 15230 bdsepg 17121 bdinex1g 17132 bdssexg 17135 bj-prexg 17142 bj-uniexg 17149 |
| Copyright terms: Public domain | W3C validator |