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Mirrors > Home > ILE Home > Th. List > sselda | Unicode version |
Description: Membership deduction from subclass relationship. (Contributed by NM, 26-Jun-2014.) |
Ref | Expression |
---|---|
sseld.1 |
Ref | Expression |
---|---|
sselda |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sseld.1 | . . 3 | |
2 | 1 | sseld 3141 | . 2 |
3 | 2 | imp 123 | 1 |
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