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Mirrors > Home > ILE Home > Th. List > mon | Unicode version |
Description: There is at most one of something which does not exist. (Contributed by Jim Kingdon, 5-Jul-2018.) |
Ref | Expression |
---|---|
mon |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ax-in2 577 | . 2 | |
2 | df-mo 1945 | . 2 | |
3 | 1, 2 | sylibr 132 | 1 |
Colors of variables: wff set class |
Syntax hints: wn 3 wi 4 wex 1421 weu 1941 wmo 1942 |
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-in2 577 |
This theorem depends on definitions: df-bi 115 df-mo 1945 |
This theorem is referenced by: moexexdc 2025 |
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