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Mirrors > Home > ILE Home > Th. List > dcned | Unicode version |
Description: Decidable equality implies decidable negated equality. (Contributed by Jim Kingdon, 3-May-2020.) |
Ref | Expression |
---|---|
dcned.eq | DECID |
Ref | Expression |
---|---|
dcned | DECID |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dcned.eq | . . 3 DECID | |
2 | dcn 779 | . . 3 DECID DECID | |
3 | 1, 2 | syl 14 | . 2 DECID |
4 | df-ne 2246 | . . 3 | |
5 | 4 | dcbii 780 | . 2 DECID DECID |
6 | 3, 5 | sylibr 132 | 1 DECID |
Colors of variables: wff set class |
Syntax hints: wn 3 wi 4 DECID wdc 775 wceq 1284 wne 2245 |
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-in1 576 ax-in2 577 ax-io 662 |
This theorem depends on definitions: df-bi 115 df-dc 776 df-ne 2246 |
This theorem is referenced by: nn0n0n1ge2b 8427 algcvgblem 10431 |
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