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Mirrors > Home > NFE Home > Th. List > ineq1i | GIF version |
Description: Equality inference for intersection of two classes. (Contributed by NM, 26-Dec-1993.) |
Ref | Expression |
---|---|
ineq1i.1 | ⊢ A = B |
Ref | Expression |
---|---|
ineq1i | ⊢ (A ∩ C) = (B ∩ C) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ineq1i.1 | . 2 ⊢ A = B | |
2 | ineq1 3450 | . 2 ⊢ (A = B → (A ∩ C) = (B ∩ C)) | |
3 | 1, 2 | ax-mp 5 | 1 ⊢ (A ∩ C) = (B ∩ C) |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1642 ∩ cin 3208 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1546 ax-5 1557 ax-17 1616 ax-9 1654 ax-8 1675 ax-6 1729 ax-7 1734 ax-11 1746 ax-12 1925 ax-ext 2334 |
This theorem depends on definitions: df-bi 177 df-or 359 df-an 360 df-nan 1288 df-tru 1319 df-ex 1542 df-nf 1545 df-sb 1649 df-clab 2340 df-cleq 2346 df-clel 2349 df-nfc 2478 df-v 2861 df-nin 3211 df-compl 3212 df-in 3213 |
This theorem is referenced by: in12 3466 inindi 3472 dfrab2 3530 dfrab3 3531 dfif5 3674 pw10 4161 resres 4980 nmembers1lem1 6268 |
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