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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 3025 ru 3028 sbceqbid 3036 sbcel12g 3140 cbvralcsf 3188 cbvrexcsf 3189 cbvreucsf 3190 cbvrabcsf 3191 onintexmid 4669 elvvuni 4788 elrnmpt1 4981 canth 5964 smoeq 6451 smores 6453 smores2 6455 iordsmo 6458 nnaordi 6671 nnaordr 6673 fvixp 6867 cbvixp 6879 mptelixpg 6898 opabfi 7126 exmidaclem 7416 cc1 7477 cc2lem 7478 cc3 7480 ltapig 7551 ltmpig 7552 fzsubel 10288 elfzp1b 10325 wrd2ind 11297 ennnfonelemg 13017 ennnfonelemp1 13020 ennnfonelemnn0 13036 ctiunctlemu1st 13048 ctiunctlemu2nd 13049 ctiunctlemudc 13051 ctiunctlemfo 13053 prdsbasprj 13358 xpsfrnel 13420 ismgm 13433 mgm1 13446 issgrpd 13488 ismndd 13513 eqgfval 13802 ringcl 14019 unitinvcl 14130 aprval 14289 aprap 14293 islmodd 14300 rspcl 14498 rnglidlmmgm 14503 zndvds 14656 istps 14749 tpspropd 14753 eltpsg 14757 isms 15170 mspropd 15195 cnlimci 15390 |
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