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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 3420 | . 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 3213 |
| 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 2216 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-v 2817 df-in 3220 |
| This theorem is referenced by: disjpr2 3758 rint0 3993 riin0 4068 disji2 4106 xpriindim 4898 riinint 5023 reseq2 5038 csbresg 5046 resindm 5085 isoselem 5999 zfz1isolem1 11237 fsumm1 12127 bitsinv1 12673 ballotfilemfval 13173 ennnfonelemhf1o 13248 nninfdclemcl 13283 nninfdclemp1 13285 nninfdc 13288 ressvalsets 13361 ressbasd 13364 ressinbasd 13371 ressressg 13372 restval 13542 mgpress 14170 subrngpropd 14462 subrgpropd 14499 crng2idl 14805 basis1 15038 baspartn 15041 eltg 15043 tgdom 15063 ntrval 15101 resttopon2 15169 restopnb 15172 qtopbasss 15512 p1evtxdeqfilem 16432 |
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