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| Mirrors > Home > ILE Home > Th. List > cbvabv | GIF version | ||
| Description: Rule used to change bound variables, using implicit substitution. (Contributed by NM, 26-May-1999.) |
| Ref | Expression |
|---|---|
| cbvabv.1 | ⊢ (𝑥 = 𝑦 → (𝜑 ↔ 𝜓)) |
| Ref | Expression |
|---|---|
| cbvabv | ⊢ {𝑥 ∣ 𝜑} = {𝑦 ∣ 𝜓} |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nfv 1581 | . 2 ⊢ Ⅎ𝑦𝜑 | |
| 2 | nfv 1581 | . 2 ⊢ Ⅎ𝑥𝜓 | |
| 3 | cbvabv.1 | . 2 ⊢ (𝑥 = 𝑦 → (𝜑 ↔ 𝜓)) | |
| 4 | 1, 2, 3 | cbvab 2364 | 1 ⊢ {𝑥 ∣ 𝜑} = {𝑦 ∣ 𝜓} |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 105 = wceq 1402 {cab 2224 |
| 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-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 |
| This theorem is used by: eqabbw 2375 cdeqab1 3043 difjust 3221 unjust 3223 injust 3225 uniiunlem 3338 dfif3 3654 pwjust 3689 snjust 3714 intab 3999 iotajust 5336 cbviotavw 5343 tfrlemi1 6603 tfr1onlemaccex 6619 tfrcllemaccex 6632 frecsuc 6678 isbth 7284 nqprlu 7914 recexpr 8005 caucvgprprlemval 8055 caucvgprprlemnbj 8060 caucvgprprlemaddq 8075 caucvgprprlem1 8076 caucvgprprlem2 8077 axcaucvg 8267 hashf1lem2 11286 mertensabs 12304 4sq 13189 ballotfilemfmpn 13234 isuhgrm 16312 isushgrm 16313 isupgren 16336 isumgren 16346 isuspgren 16398 isusgren 16399 bds 16877 |
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