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Mirrors > Home > ILE Home > Th. List > dfdisj2 | Unicode version |
Description: Alternate definition for disjoint classes. (Contributed by NM, 17-Jun-2017.) |
Ref | Expression |
---|---|
dfdisj2 | Disj |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-disj 3907 | . 2 Disj | |
2 | df-rmo 2424 | . . 3 | |
3 | 2 | albii 1446 | . 2 |
4 | 1, 3 | bitri 183 | 1 Disj |
Colors of variables: wff set class |
Syntax hints: wa 103 wb 104 wal 1329 wcel 1480 wmo 2000 wrmo 2419 Disj wdisj 3906 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-5 1423 ax-gen 1425 |
This theorem depends on definitions: df-bi 116 df-rmo 2424 df-disj 3907 |
This theorem is referenced by: disjss1 3912 nfdisjv 3918 invdisj 3923 sndisj 3925 disjxsn 3927 |
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