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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 3399 | . 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 1395 ∩ cin 3196 |
| 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 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-ext 2211 |
| This theorem depends on definitions: df-bi 117 df-tru 1398 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-v 2801 df-in 3203 |
| This theorem is referenced by: disjpr2 3730 rint0 3962 riin0 4037 disji2 4075 xpriindim 4860 riinint 4985 reseq2 5000 csbresg 5008 resindm 5047 isoselem 5950 zfz1isolem1 11075 fsumm1 11942 bitsinv1 12488 ennnfonelemhf1o 12999 nninfdclemcl 13034 nninfdclemp1 13036 nninfdc 13039 ressvalsets 13112 ressbasd 13115 ressinbasd 13122 ressressg 13123 restval 13293 mgpress 13909 subrngpropd 14195 subrgpropd 14232 crng2idl 14510 basis1 14736 baspartn 14739 eltg 14741 tgdom 14761 ntrval 14799 resttopon2 14867 restopnb 14870 qtopbasss 15210 |
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