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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 6583 nnacl 6757 nnmcl 6758 nnacom 6761 nnaass 6762 nndi 6763 nnmass 6764 nnmsucr 6765 nnmcom 6766 nnsucsssuc 6769 nntri3or 6770 nnaordi 6785 nnaword 6788 nnmordi 6793 nnaordex 6805 ixpfn 6990 findcard 7196 findcard2 7197 findcard2s 7198 exmidomni 7488 indpi 7715 prarloclem3 7870 uzind4s2 10007 cnref1o 10068 frec2uzrdg 10867 expcl2lemap 11009 seq3coll 11316 climub 12135 climserle 12136 fsum3cvg 12170 summodclem2a 12173 prodfap0 12337 prodfrecap 12338 fproddccvg 12364 alginv 12850 algcvg 12851 algcvga 12854 algfx 12855 prmind2 12923 prmpwdvds 13163 lgsdir2lem4 16355 |
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