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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 3372 | . 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 1373 ∩ cin 3169 |
| 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 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-ext 2188 |
| This theorem depends on definitions: df-bi 117 df-tru 1376 df-nf 1485 df-sb 1787 df-clab 2193 df-cleq 2199 df-clel 2202 df-nfc 2338 df-v 2775 df-in 3176 |
| This theorem is referenced by: disjpr2 3702 rint0 3930 riin0 4005 disji2 4043 xpriindim 4824 riinint 4948 reseq2 4963 csbresg 4971 resindm 5010 isoselem 5902 zfz1isolem1 11007 fsumm1 11802 bitsinv1 12348 ennnfonelemhf1o 12859 nninfdclemcl 12894 nninfdclemp1 12896 nninfdc 12899 ressvalsets 12971 ressbasd 12974 ressinbasd 12981 ressressg 12982 restval 13152 mgpress 13768 subrngpropd 14053 subrgpropd 14090 crng2idl 14368 basis1 14594 baspartn 14597 eltg 14599 tgdom 14619 ntrval 14657 resttopon2 14725 restopnb 14728 qtopbasss 15068 |
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