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| Mirrors > Home > ILE Home > Th. List > ineq1d | 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 |
|---|---|
| ineq1d | ⊢ (𝜑 → (𝐴 ∩ 𝐶) = (𝐵 ∩ 𝐶)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ineq1d.1 | . 2 ⊢ (𝜑 → 𝐴 = 𝐵) | |
| 2 | ineq1 3425 | . 2 ⊢ (𝐴 = 𝐵 → (𝐴 ∩ 𝐶) = (𝐵 ∩ 𝐶)) | |
| 3 | 1, 2 | syl 14 | 1 ⊢ (𝜑 → (𝐴 ∩ 𝐶) = (𝐵 ∩ 𝐶)) |
| 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: diftpsn3 3856 disji2 4122 ordpwsucexmid 4719 riinint 5045 fnresdisj 5496 fnimadisj 5507 ofovex 6311 ecinxp 6888 fiintim 7242 fival 7309 fzval2 10431 fvinim0ffz 10677 hashfibc 11305 fsum1p 12210 fprod1p 12391 ballotfilemfval 13287 ballotfilemfp1 13289 ballotfilemfc0 13290 ballotfilemfcc 13291 ballotfilemgval 13325 ballotfilemgun 13326 strressid 13484 restopnb 15407 metrest 15732 qtopbasss 15747 chtqcl 16244 chtqval 16245 ppiqval 16248 ppival2 16249 ppival2g 16250 chtqfl 16258 ppiprm 16259 chtprm 16261 chtnprm 16262 chtdif 16264 ppidif 16269 prmorcht 16282 |
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