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Mirrors > Home > ILE Home > Th. List > moabs | Unicode version |
Description: Absorption of existence condition by "at most one". (Contributed by NM, 4-Nov-2002.) |
Ref | Expression |
---|---|
moabs |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | pm5.4 248 | . 2 | |
2 | df-mo 2023 | . . 3 | |
3 | 2 | imbi2i 225 | . 2 |
4 | 1, 3, 2 | 3bitr4ri 212 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wb 104 wex 1485 weu 2019 wmo 2020 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 |
This theorem depends on definitions: df-bi 116 df-mo 2023 |
This theorem is referenced by: mo2icl 2909 dffun7 5223 |
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