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Mirrors > Home > ILE Home > Th. List > conax1 | Unicode version |
Description: Contrapositive of ax-1 6. (Contributed by BJ, 28-Oct-2023.) |
Ref | Expression |
---|---|
conax1 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ax-1 6 | . 2 | |
2 | 1 | con3i 622 | 1 |
Colors of variables: wff set class |
Syntax hints: wn 3 wi 4 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-in1 604 ax-in2 605 |
This theorem is referenced by: conax1k 644 |
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