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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 2276 | . 2 ⊢ (𝜑 → (𝐴 ∈ 𝐶 ↔ 𝐴 ∈ 𝐷)) |
| 3 | eleq1d.1 | . . 3 ⊢ (𝜑 → 𝐴 = 𝐵) | |
| 4 | 3 | eleq1d 2275 | . 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 1373 ∈ wcel 2177 |
| 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 1471 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-4 1534 ax-17 1550 ax-ial 1558 ax-ext 2188 |
| This theorem depends on definitions: df-bi 117 df-cleq 2199 df-clel 2202 |
| This theorem is referenced by: cbvraldva2 2746 cbvrexdva2 2747 cdeqel 2998 ru 3001 sbceqbid 3009 sbcel12g 3112 cbvralcsf 3160 cbvrexcsf 3161 cbvreucsf 3162 cbvrabcsf 3163 onintexmid 4628 elvvuni 4746 elrnmpt1 4937 canth 5909 smoeq 6388 smores 6390 smores2 6392 iordsmo 6395 nnaordi 6606 nnaordr 6608 fvixp 6802 cbvixp 6814 mptelixpg 6833 opabfi 7049 exmidaclem 7335 cc1 7392 cc2lem 7393 cc3 7395 ltapig 7466 ltmpig 7467 fzsubel 10197 elfzp1b 10234 wrd2ind 11194 ennnfonelemg 12844 ennnfonelemp1 12847 ennnfonelemnn0 12863 ctiunctlemu1st 12875 ctiunctlemu2nd 12876 ctiunctlemudc 12878 ctiunctlemfo 12880 prdsbasprj 13184 xpsfrnel 13246 ismgm 13259 mgm1 13272 issgrpd 13314 ismndd 13339 eqgfval 13628 ringcl 13845 unitinvcl 13955 aprval 14114 aprap 14118 islmodd 14125 rspcl 14323 rnglidlmmgm 14328 zndvds 14481 istps 14574 tpspropd 14578 eltpsg 14582 isms 14995 mspropd 15020 cnlimci 15215 |
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