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Mirrors > Home > ILE Home > Th. List > dfint2 | Unicode version |
Description: Alternate definition of class intersection. (Contributed by NM, 28-Jun-1998.) |
Ref | Expression |
---|---|
dfint2 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-int 3637 | . 2 | |
2 | df-ral 2353 | . . 3 | |
3 | 2 | abbii 2194 | . 2 |
4 | 1, 3 | eqtr4i 2104 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wal 1282 wceq 1284 wcel 1433 cab 2067 wral 2348 cint 3636 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-5 1376 ax-7 1377 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-8 1435 ax-11 1437 ax-4 1440 ax-17 1459 ax-i9 1463 ax-ial 1467 ax-i5r 1468 ax-ext 2063 |
This theorem depends on definitions: df-bi 115 df-tru 1287 df-nf 1390 df-sb 1686 df-clab 2068 df-cleq 2074 df-ral 2353 df-int 3637 |
This theorem is referenced by: inteq 3639 nfint 3646 intiin 3732 |
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