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| Mirrors > Home > ILE Home > Th. List > ineq2d | GIF version | ||
| Description: Equality deduction for intersection of two classes. (Contributed by NM, 10-Apr-1994.) |
| Ref | Expression |
|---|---|
| ineq1d.1 | ⊢ (𝜑 → 𝐴 = 𝐵) |
| Ref | Expression |
|---|---|
| ineq2d | ⊢ (𝜑 → (𝐶 ∩ 𝐴) = (𝐶 ∩ 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ineq1d.1 | . 2 ⊢ (𝜑 → 𝐴 = 𝐵) | |
| 2 | ineq2 3416 | . 2 ⊢ (𝐴 = 𝐵 → (𝐶 ∩ 𝐴) = (𝐶 ∩ 𝐵)) | |
| 3 | 1, 2 | syl 14 | 1 ⊢ (𝜑 → (𝐶 ∩ 𝐴) = (𝐶 ∩ 𝐵)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1398 ∩ cin 3210 |
| 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-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-ext 2214 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-v 2815 df-in 3217 |
| This theorem is referenced by: disjpr2 3753 rint0 3988 riin0 4063 disji2 4101 xpriindim 4893 riinint 5018 reseq2 5033 csbresg 5041 resindm 5080 isoselem 5993 zfz1isolem1 11212 fsumm1 12102 bitsinv1 12648 ennnfonelemhf1o 13164 nninfdclemcl 13199 nninfdclemp1 13201 nninfdc 13204 ressvalsets 13277 ressbasd 13280 ressinbasd 13287 ressressg 13288 restval 13458 mgpress 14075 subrngpropd 14361 subrgpropd 14398 crng2idl 14679 basis1 14912 baspartn 14915 eltg 14917 tgdom 14937 ntrval 14975 resttopon2 15043 restopnb 15046 qtopbasss 15386 p1evtxdeqfilem 16306 |
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