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Mirrors > Home > QLE Home > Th. List > con4 | Unicode version |
Description: Contraposition inference. |
Ref | Expression |
---|---|
con4.1 |
Ref | Expression |
---|---|
con4 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | con4.1 | . 2 | |
2 | 1 | ax-r4 37 | 1 |
Colors of variables: term |
Syntax hints: wb 1 wn 4 |
This theorem was proved from axioms: ax-r4 37 |
This theorem is referenced by: k1-6 353 k1-7 354 |
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