Metamath Proof Explorer
Description: Restricted existential quantification over a singleton. (Contributed by NM, 29-Jan-2012) (Proof shortened by AV, 7-Apr-2023)
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|
Ref |
Expression |
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Hypothesis |
ralsng.1 |
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Assertion |
rexsng |
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Proof
Step |
Hyp |
Ref |
Expression |
1 |
|
ralsng.1 |
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2 |
|
nfv |
|
3 |
2 1
|
rexsngf |
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