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Mirrors > Home > MPE Home > Th. List > nfcxfr | Structured version Visualization version Unicode version |
Description: A utility lemma to transfer a bound-variable hypothesis builder into a definition. (Contributed by Mario Carneiro, 11-Aug-2016.) |
Ref | Expression |
---|---|
nfceqi.1 | |
nfcxfr.2 |
Ref | Expression |
---|---|
nfcxfr |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfcxfr.2 | . 2 | |
2 | nfceqi.1 | . . 3 | |
3 | 2 | nfceqi 2761 | . 2 |
4 | 1, 3 | mpbir 221 | 1 |
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