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Mirrors > Home > ILE Home > Th. List > nner | Unicode version |
Description: Negation of inequality. (Contributed by Jim Kingdon, 23-Dec-2018.) |
Ref | Expression |
---|---|
nner |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-ne 2206 | . . 3 | |
2 | 1 | biimpi 113 | . 2 |
3 | 2 | con2i 557 | 1 |
Colors of variables: wff set class |
Syntax hints: wn 3 wi 4 wceq 1243 wne 2204 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 99 ax-in1 544 ax-in2 545 |
This theorem depends on definitions: df-bi 110 df-ne 2206 |
This theorem is referenced by: nn0eln0 4341 funtpg 4950 fin0 6342 |
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