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Mirrors > Home > ILE Home > Th. List > nfcv | Unicode version |
Description: If is disjoint from , then is not free in . (Contributed by Mario Carneiro, 11-Aug-2016.) |
Ref | Expression |
---|---|
nfcv |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfv 1521 | . 2 | |
2 | 1 | nfci 2302 | 1 |
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