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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 2304 | . 2 ⊢ (𝜑 → (𝐴 ∈ 𝐶 ↔ 𝐴 ∈ 𝐷)) |
| 3 | eleq1d.1 | . . 3 ⊢ (𝜑 → 𝐴 = 𝐵) | |
| 4 | 3 | eleq1d 2303 | . 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 2205 |
| 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 2216 |
| This theorem depends on definitions: df-bi 117 df-cleq 2227 df-clel 2230 |
| This theorem is referenced by: cbvraldva2 2787 cbvrexdva2 2788 cdeqel 3041 ru 3044 sbceqbid 3052 sbcel12g 3156 cbvralcsf 3204 cbvrexcsf 3205 cbvreucsf 3206 cbvrabcsf 3207 onintexmid 4700 elvvuni 4819 elrnmpt1 5013 canth 6009 smoeq 6534 smores 6536 smores2 6538 iordsmo 6541 nnaordi 6754 nnaordr 6756 fvixp 6951 cbvixp 6963 mptelixpg 6982 opabfi 7213 exmidaclem 7528 cc1 7595 cc2lem 7596 cc3 7598 ltapig 7669 ltmpig 7670 fzsubel 10415 elfzp1b 10453 wrd2ind 11440 ennnfonelemg 13238 ennnfonelemp1 13241 ennnfonelemnn0 13257 ctiunctlemu1st 13269 ctiunctlemu2nd 13270 ctiunctlemudc 13272 ctiunctlemfo 13274 prdsbasprj 13579 xpsfrnel 13641 ismgm 13654 mgm1 13667 issgrpd 13709 ismndd 13734 eqgfval 14023 ringcl 14241 unitinvcl 14353 aprval 14514 aprap 14521 aprprop 14524 islmodd 14553 rspcl 14751 rnglidlmmgm 14756 zndvds 14909 istps 15009 tpspropd 15013 eltpsg 15017 isms 15430 mspropd 15455 cnlimci 15650 depindlem2 16614 |
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