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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 2374 | . 2 ⊢ Ⅎ𝑥𝐴 | |
| 2 | nfv 1576 | . 2 ⊢ Ⅎ𝑥𝜓 | |
| 3 | vtoclga.1 | . 2 ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜓)) | |
| 4 | vtoclga.2 | . 2 ⊢ (𝑥 ∈ 𝐵 → 𝜑) | |
| 5 | 1, 2, 3, 4 | vtoclgaf 2869 | 1 ⊢ (𝐴 ∈ 𝐵 → 𝜓) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ↔ wb 105 = wceq 1397 ∈ wcel 2202 |
| 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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-ext 2213 |
| This theorem depends on definitions: df-bi 117 df-tru 1400 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-v 2804 |
| This theorem is referenced by: vtoclri 2881 ssuni 3915 ordtriexmid 4619 onsucsssucexmid 4625 tfis3 4684 fvmpt3 5725 fvmptssdm 5731 fnressn 5839 fressnfv 5840 caovord 6193 caovimo 6215 tfrlem1 6473 nnacl 6647 nnmcl 6648 nnacom 6651 nnaass 6652 nndi 6653 nnmass 6654 nnmsucr 6655 nnmcom 6656 nnsucsssuc 6659 nntri3or 6660 nnaordi 6675 nnaword 6678 nnmordi 6683 nnaordex 6695 ixpfn 6872 findcard 7076 findcard2 7077 findcard2s 7078 exmidomni 7340 indpi 7561 prarloclem3 7716 uzind4s2 9824 cnref1o 9884 frec2uzrdg 10670 expcl2lemap 10812 seq3coll 11105 climub 11904 climserle 11905 fsum3cvg 11938 summodclem2a 11941 prodfap0 12105 prodfrecap 12106 fproddccvg 12132 alginv 12618 algcvg 12619 algcvga 12622 algfx 12623 prmind2 12691 prmpwdvds 12927 lgsdir2lem4 15759 |
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