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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 3426 | . 2 ⊢ (𝐴 = 𝐵 → (𝐶 ∩ 𝐴) = (𝐶 ∩ 𝐵)) | |
| 3 | 1, 2 | syl 14 | 1 ⊢ (𝜑 → (𝐶 ∩ 𝐴) = (𝐶 ∩ 𝐵)) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 = wceq 1402 ∩ cin 3219 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 |
| This proof depends on definitions: df-bi 117 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-v 2823 df-in 3226 |
| This theorem is used by: disjpr2 3773 rint0 4009 riin0 4084 disji2 4122 xpriindim 4920 riinint 5045 reseq2 5060 csbresg 5068 resindm 5108 isoselem 6029 ofovex 6311 zfz1isolem1 11314 fsumm1 12208 bitsinv1 12754 ballotfilemfval 13287 ennnfonelemhf1o 13362 nninfdclemcl 13397 nninfdclemp1 13399 nninfdc 13402 ressvalsets 13476 ressbasd 13480 ressinbasd 13487 ressressg 13488 restval 13658 mgpress 14337 subrngpropd 14633 subrgpropd 14670 crng2idl 14977 basis1 15273 baspartn 15276 eltg 15278 tgdom 15298 ntrval 15336 resttopon2 15404 restopnb 15407 qtopbasss 15747 p1evtxdeqfilem 16757 |
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