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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 2392 | . 2 ⊢ Ⅎ𝑥𝐴 | |
| 2 | nfv 1581 | . 2 ⊢ Ⅎ𝑥𝜓 | |
| 3 | vtoclga.1 | . 2 ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜓)) | |
| 4 | vtoclga.2 | . 2 ⊢ (𝑥 ∈ 𝐵 → 𝜑) | |
| 5 | 1, 2, 3, 4 | vtoclgaf 2888 | 1 ⊢ (𝐴 ∈ 𝐵 → 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: vtoclri 2900 ssuni 3957 ordtriexmid 4670 onsucsssucexmid 4676 tfis3 4735 fvmpt3 5787 fvmptssdm 5793 fnressn 5904 fressnfv 5905 caovord 6264 caovimo 6286 tfrlem1 6584 nnacl 6758 nnmcl 6759 nnacom 6762 nnaass 6763 nndi 6764 nnmass 6765 nnmsucr 6766 nnmcom 6767 nnsucsssuc 6770 nntri3or 6771 nnaordi 6786 nnaword 6789 nnmordi 6794 nnaordex 6806 ixpfn 6992 findcard 7198 findcard2 7199 findcard2s 7200 exmidomni 7488 indpi 7715 prarloclem3 7870 uzind4s2 10006 cnref1o 10067 frec2uzrdg 10866 expcl2lemap 11008 seq3coll 11315 climub 12134 climserle 12135 fsum3cvg 12169 summodclem2a 12172 prodfap0 12336 prodfrecap 12337 fproddccvg 12363 alginv 12849 algcvg 12850 algcvga 12853 algfx 12854 prmind2 12922 prmpwdvds 13162 lgsdir2lem4 16372 |
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