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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 1397 ∈ 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 1495 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-4 1558 ax-17 1574 ax-ial 1582 ax-ext 2213 |
| This theorem depends on definitions: df-bi 117 df-cleq 2224 df-clel 2227 |
| This theorem is referenced by: cbvraldva2 2774 cbvrexdva2 2775 cdeqel 3027 ru 3030 sbceqbid 3038 sbcel12g 3142 cbvralcsf 3190 cbvrexcsf 3191 cbvreucsf 3192 cbvrabcsf 3193 onintexmid 4671 elvvuni 4790 elrnmpt1 4983 canth 5969 smoeq 6456 smores 6458 smores2 6460 iordsmo 6463 nnaordi 6676 nnaordr 6678 fvixp 6872 cbvixp 6884 mptelixpg 6903 opabfi 7132 exmidaclem 7423 cc1 7484 cc2lem 7485 cc3 7487 ltapig 7558 ltmpig 7559 fzsubel 10295 elfzp1b 10332 wrd2ind 11308 ennnfonelemg 13029 ennnfonelemp1 13032 ennnfonelemnn0 13048 ctiunctlemu1st 13060 ctiunctlemu2nd 13061 ctiunctlemudc 13063 ctiunctlemfo 13065 prdsbasprj 13370 xpsfrnel 13432 ismgm 13445 mgm1 13458 issgrpd 13500 ismndd 13525 eqgfval 13814 ringcl 14032 unitinvcl 14143 aprval 14302 aprap 14306 islmodd 14313 rspcl 14511 rnglidlmmgm 14516 zndvds 14669 istps 14762 tpspropd 14766 eltpsg 14770 isms 15183 mspropd 15208 cnlimci 15403 depindlem2 16352 |
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