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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 |
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nfceqi.1 |
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nfcxfr.2 |
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Ref | Expression |
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nfcxfr |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfcxfr.2 |
. 2
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2 | nfceqi.1 |
. . 3
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3 | 2 | nfceqi 2761 |
. 2
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4 | 1, 3 | mpbir 221 |
1
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