| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 2308 | . 2 ⊢ (𝜑 → (𝐴 ∈ 𝐶 ↔ 𝐴 ∈ 𝐷)) |
| 3 | eleq1d.1 | . . 3 ⊢ (𝜑 → 𝐴 = 𝐵) | |
| 4 | 3 | eleq1d 2307 | . 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 1402 ∈ wcel 2209 |
| 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 1500 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-4 1563 ax-17 1579 ax-ial 1587 ax-ext 2220 |
| This theorem depends on definitions: df-bi 117 df-cleq 2231 df-clel 2234 |
| This theorem is referenced by: cbvraldva2 2793 cbvrexdva2 2794 cdeqel 3047 ru 3050 sbceqbid 3058 sbcel12g 3162 cbvralcsf 3210 cbvrexcsf 3211 cbvreucsf 3212 cbvrabcsf 3213 onintexmid 4718 elvvuni 4837 elrnmpt1 5031 canth 6030 smoeq 6555 smores 6557 smores2 6559 iordsmo 6562 nnaordi 6775 nnaordr 6777 fvixp 6979 cbvixp 6991 mptelixpg 7010 opabfi 7241 exmidaclem 7558 cc1 7625 cc2lem 7626 cc3 7628 ltapig 7699 ltmpig 7700 fzsubel 10449 elfzp1b 10487 wrd2ind 11478 ennnfonelemg 13277 ennnfonelemp1 13280 ennnfonelemnn0 13296 ctiunctlemu1st 13308 ctiunctlemu2nd 13309 ctiunctlemudc 13311 ctiunctlemfo 13313 xpsfrnel 13648 ismgm 13660 mgm1 13673 issgrpd 13710 ismndd 13733 eqgfval 14008 prdsbasprj 14165 ringcl 14300 unitinvcl 14413 aprval 14574 aprap 14581 aprprop 14584 islmodd 14612 rspcl 14811 rnglidlmmgm 14816 zndvds 14967 istps 15116 tpspropd 15120 eltpsg 15124 isms 15537 mspropd 15562 cnlimci 15757 depindlem2 16731 |
| Copyright terms: Public domain | W3C validator |