Metamath Proof Explorer
Description: Conjunction form of e21 . (Contributed by Alan Sare, 15-Jun-2011)
(Proof modification is discouraged.) (New usage is discouraged.)
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Ref |
Expression |
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Hypotheses |
e21an.1 |
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e21an.2 |
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e21an.3 |
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Assertion |
e21an |
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Proof
Step |
Hyp |
Ref |
Expression |
1 |
|
e21an.1 |
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2 |
|
e21an.2 |
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3 |
|
e21an.3 |
|
4 |
3
|
ex |
|
5 |
1 2 4
|
e21 |
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