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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 4918 riinint 5043 reseq2 5058 csbresg 5066 resindm 5105 isoselem 6026 zfz1isolem1 11292 fsumm1 12183 bitsinv1 12729 ballotfilemfval 13229 ennnfonelemhf1o 13304 nninfdclemcl 13339 nninfdclemp1 13341 nninfdc 13344 ressvalsets 13418 ressbasd 13421 ressinbasd 13428 ressressg 13429 restval 13599 mgpress 14230 subrngpropd 14524 subrgpropd 14561 crng2idl 14868 basis1 15148 baspartn 15151 eltg 15153 tgdom 15173 ntrval 15211 resttopon2 15279 restopnb 15282 qtopbasss 15622 p1evtxdeqfilem 16552 |
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