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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 2302 | . 2 ⊢ (𝜑 → (𝐴 ∈ 𝐶 ↔ 𝐴 ∈ 𝐷)) |
| 3 | eleq1d.1 | . . 3 ⊢ (𝜑 → 𝐴 = 𝐵) | |
| 4 | 3 | eleq1d 2301 | . 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 2203 |
| 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 2214 |
| This theorem depends on definitions: df-bi 117 df-cleq 2225 df-clel 2228 |
| This theorem is referenced by: cbvraldva2 2784 cbvrexdva2 2785 cdeqel 3037 ru 3040 sbceqbid 3048 sbcel12g 3152 cbvralcsf 3200 cbvrexcsf 3201 cbvreucsf 3202 cbvrabcsf 3203 onintexmid 4694 elvvuni 4813 elrnmpt1 5007 canth 6000 smoeq 6520 smores 6522 smores2 6524 iordsmo 6527 nnaordi 6740 nnaordr 6742 fvixp 6937 cbvixp 6949 mptelixpg 6968 opabfi 7199 exmidaclem 7514 cc1 7578 cc2lem 7579 cc3 7581 ltapig 7652 ltmpig 7653 fzsubel 10393 elfzp1b 10430 wrd2ind 11411 ennnfonelemg 13146 ennnfonelemp1 13149 ennnfonelemnn0 13165 ctiunctlemu1st 13177 ctiunctlemu2nd 13178 ctiunctlemudc 13180 ctiunctlemfo 13182 prdsbasprj 13487 xpsfrnel 13549 ismgm 13562 mgm1 13575 issgrpd 13617 ismndd 13642 eqgfval 13931 ringcl 14149 unitinvcl 14260 aprval 14420 aprap 14424 islmodd 14433 rspcl 14631 rnglidlmmgm 14636 zndvds 14789 istps 14889 tpspropd 14893 eltpsg 14897 isms 15310 mspropd 15335 cnlimci 15530 depindlem2 16494 |
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