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Mirrors > Home > ILE Home > Th. List > com23 | Unicode version |
Description: Commutation of antecedents. Swap 2nd and 3rd. (Contributed by NM, 5-Aug-1993.) (Proof shortened by Wolf Lammen, 4-Aug-2012.) |
Ref | Expression |
---|---|
com3.1 |
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Ref | Expression |
---|---|
com23 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | com3.1 |
. 2
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2 | pm2.27 40 |
. 2
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3 | 1, 2 | syl9 72 |
1
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