Metamath Proof Explorer
Description: Deduction adding a conjunct to antecedent. (Contributed by NM, 8-Jan-2006) (Proof shortened by Wolf Lammen, 25-Jun-2022)
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Ref |
Expression |
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Hypothesis |
ad4ant3.1 |
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Assertion |
3adant3r |
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Proof
Step |
Hyp |
Ref |
Expression |
1 |
|
ad4ant3.1 |
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2 |
|
simpl |
|
3 |
2 1
|
syl3an3 |
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