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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 3367 | . 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 1372 ∩ cin 3164 |
| 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 710 ax-5 1469 ax-7 1470 ax-gen 1471 ax-ie1 1515 ax-ie2 1516 ax-8 1526 ax-10 1527 ax-11 1528 ax-i12 1529 ax-bndl 1531 ax-4 1532 ax-17 1548 ax-i9 1552 ax-ial 1556 ax-i5r 1557 ax-ext 2186 |
| This theorem depends on definitions: df-bi 117 df-tru 1375 df-nf 1483 df-sb 1785 df-clab 2191 df-cleq 2197 df-clel 2200 df-nfc 2336 df-v 2773 df-in 3171 |
| This theorem is referenced by: disjpr2 3696 rint0 3923 riin0 3998 disji2 4036 xpriindim 4814 riinint 4937 reseq2 4951 csbresg 4959 resindm 4998 isoselem 5879 zfz1isolem1 10966 fsumm1 11646 bitsinv1 12192 ennnfonelemhf1o 12703 nninfdclemcl 12738 nninfdclemp1 12740 nninfdc 12743 ressvalsets 12815 ressbasd 12818 ressinbasd 12825 ressressg 12826 restval 12995 mgpress 13611 subrngpropd 13896 subrgpropd 13933 crng2idl 14211 basis1 14437 baspartn 14440 eltg 14442 tgdom 14462 ntrval 14500 resttopon2 14568 restopnb 14571 qtopbasss 14911 |
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