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| Mirrors > Home > ILE Home > Th. List > eleq12d | GIF version | ||
| Description: Deduction from equality to equivalence of membership. (Contributed by NM, 31-May-1994.) |
| Ref | Expression |
|---|---|
| eleq1d.1 | ⊢ (𝜑 → 𝐴 = 𝐵) |
| eleq12d.2 | ⊢ (𝜑 → 𝐶 = 𝐷) |
| Ref | Expression |
|---|---|
| eleq12d | ⊢ (𝜑 → (𝐴 ∈ 𝐶 ↔ 𝐵 ∈ 𝐷)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eleq12d.2 | . . 3 ⊢ (𝜑 → 𝐶 = 𝐷) | |
| 2 | 1 | eleq2d 2301 | . 2 ⊢ (𝜑 → (𝐴 ∈ 𝐶 ↔ 𝐴 ∈ 𝐷)) |
| 3 | eleq1d.1 | . . 3 ⊢ (𝜑 → 𝐴 = 𝐵) | |
| 4 | 3 | eleq1d 2300 | . 2 ⊢ (𝜑 → (𝐴 ∈ 𝐷 ↔ 𝐵 ∈ 𝐷)) |
| 5 | 2, 4 | bitrd 188 | 1 ⊢ (𝜑 → (𝐴 ∈ 𝐶 ↔ 𝐵 ∈ 𝐷)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ↔ wb 105 = wceq 1398 ∈ 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-5 1496 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-4 1559 ax-17 1575 ax-ial 1583 ax-ext 2213 |
| This theorem depends on definitions: df-bi 117 df-cleq 2224 df-clel 2227 |
| This theorem is referenced by: cbvraldva2 2775 cbvrexdva2 2776 cdeqel 3028 ru 3031 sbceqbid 3039 sbcel12g 3143 cbvralcsf 3191 cbvrexcsf 3192 cbvreucsf 3193 cbvrabcsf 3194 onintexmid 4677 elvvuni 4796 elrnmpt1 4989 canth 5979 smoeq 6499 smores 6501 smores2 6503 iordsmo 6506 nnaordi 6719 nnaordr 6721 fvixp 6915 cbvixp 6927 mptelixpg 6946 opabfi 7175 exmidaclem 7466 cc1 7527 cc2lem 7528 cc3 7530 ltapig 7601 ltmpig 7602 fzsubel 10338 elfzp1b 10375 wrd2ind 11351 ennnfonelemg 13085 ennnfonelemp1 13088 ennnfonelemnn0 13104 ctiunctlemu1st 13116 ctiunctlemu2nd 13117 ctiunctlemudc 13119 ctiunctlemfo 13121 prdsbasprj 13426 xpsfrnel 13488 ismgm 13501 mgm1 13514 issgrpd 13556 ismndd 13581 eqgfval 13870 ringcl 14088 unitinvcl 14199 aprval 14358 aprap 14362 islmodd 14369 rspcl 14567 rnglidlmmgm 14572 zndvds 14725 istps 14823 tpspropd 14827 eltpsg 14831 isms 15244 mspropd 15269 cnlimci 15464 depindlem2 16428 |
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