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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 2299 | . 2 ⊢ (𝜑 → (𝐴 ∈ 𝐶 ↔ 𝐴 ∈ 𝐷)) |
| 3 | eleq1d.1 | . . 3 ⊢ (𝜑 → 𝐴 = 𝐵) | |
| 4 | 3 | eleq1d 2298 | . 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 1395 ∈ wcel 2200 |
| 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 1493 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-4 1556 ax-17 1572 ax-ial 1580 ax-ext 2211 |
| This theorem depends on definitions: df-bi 117 df-cleq 2222 df-clel 2225 |
| This theorem is referenced by: cbvraldva2 2772 cbvrexdva2 2773 cdeqel 3024 ru 3027 sbceqbid 3035 sbcel12g 3139 cbvralcsf 3187 cbvrexcsf 3188 cbvreucsf 3189 cbvrabcsf 3190 onintexmid 4666 elvvuni 4785 elrnmpt1 4978 canth 5961 smoeq 6447 smores 6449 smores2 6451 iordsmo 6454 nnaordi 6667 nnaordr 6669 fvixp 6863 cbvixp 6875 mptelixpg 6894 opabfi 7116 exmidaclem 7406 cc1 7467 cc2lem 7468 cc3 7470 ltapig 7541 ltmpig 7542 fzsubel 10273 elfzp1b 10310 wrd2ind 11276 ennnfonelemg 12995 ennnfonelemp1 12998 ennnfonelemnn0 13014 ctiunctlemu1st 13026 ctiunctlemu2nd 13027 ctiunctlemudc 13029 ctiunctlemfo 13031 prdsbasprj 13336 xpsfrnel 13398 ismgm 13411 mgm1 13424 issgrpd 13466 ismndd 13491 eqgfval 13780 ringcl 13997 unitinvcl 14108 aprval 14267 aprap 14271 islmodd 14278 rspcl 14476 rnglidlmmgm 14481 zndvds 14634 istps 14727 tpspropd 14731 eltpsg 14735 isms 15148 mspropd 15173 cnlimci 15368 |
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