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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 4668 onsucsssucexmid 4674 tfis3 4733 fvmpt3 5784 fvmptssdm 5790 fnressn 5901 fressnfv 5902 caovord 6261 caovimo 6283 tfrlem1 6579 nnacl 6753 nnmcl 6754 nnacom 6757 nnaass 6758 nndi 6759 nnmass 6760 nnmsucr 6761 nnmcom 6762 nnsucsssuc 6765 nntri3or 6766 nnaordi 6781 nnaword 6784 nnmordi 6789 nnaordex 6801 ixpfn 6986 findcard 7192 findcard2 7193 findcard2s 7194 exmidomni 7483 indpi 7710 prarloclem3 7865 uzind4s2 10001 cnref1o 10062 frec2uzrdg 10861 expcl2lemap 11003 seq3coll 11310 climub 12129 climserle 12130 fsum3cvg 12164 summodclem2a 12167 prodfap0 12331 prodfrecap 12332 fproddccvg 12358 alginv 12844 algcvg 12845 algcvga 12848 algfx 12849 prmind2 12917 prmpwdvds 13157 lgsdir2lem4 16316 |
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