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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 2384 | . 2 ⊢ Ⅎ𝑥𝐴 | |
| 2 | nfv 1577 | . 2 ⊢ Ⅎ𝑥𝜓 | |
| 3 | vtoclga.1 | . 2 ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜓)) | |
| 4 | vtoclga.2 | . 2 ⊢ (𝑥 ∈ 𝐵 → 𝜑) | |
| 5 | 1, 2, 3, 4 | vtoclgaf 2880 | 1 ⊢ (𝐴 ∈ 𝐵 → 𝜓) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ↔ wb 105 = wceq 1398 ∈ wcel 2203 |
| 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-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-ext 2214 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-v 2815 |
| This theorem is referenced by: vtoclri 2892 ssuni 3936 ordtriexmid 4643 onsucsssucexmid 4649 tfis3 4708 fvmpt3 5756 fvmptssdm 5762 fnressn 5870 fressnfv 5871 caovord 6226 caovimo 6248 tfrlem1 6539 nnacl 6713 nnmcl 6714 nnacom 6717 nnaass 6718 nndi 6719 nnmass 6720 nnmsucr 6721 nnmcom 6722 nnsucsssuc 6725 nntri3or 6726 nnaordi 6741 nnaword 6744 nnmordi 6749 nnaordex 6761 ixpfn 6939 findcard 7145 findcard2 7146 findcard2s 7147 exmidomni 7433 indpi 7657 prarloclem3 7812 uzind4s2 9923 cnref1o 9983 frec2uzrdg 10771 expcl2lemap 10913 seq3coll 11214 climub 12029 climserle 12030 fsum3cvg 12064 summodclem2a 12067 prodfap0 12231 prodfrecap 12232 fproddccvg 12258 alginv 12744 algcvg 12745 algcvga 12748 algfx 12749 prmind2 12817 prmpwdvds 13053 lgsdir2lem4 15904 |
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