Metamath Proof Explorer
Description: Double deduction form of 3jaoi . (Contributed by Scott Fenton, 20-Apr-2011)
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Ref |
Expression |
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Hypotheses |
3jaodd.1 |
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|
3jaodd.2 |
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|
3jaodd.3 |
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Assertion |
3jaodd |
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Proof
Step |
Hyp |
Ref |
Expression |
1 |
|
3jaodd.1 |
|
2 |
|
3jaodd.2 |
|
3 |
|
3jaodd.3 |
|
4 |
1
|
com3r |
|
5 |
2
|
com3r |
|
6 |
3
|
com3r |
|
7 |
4 5 6
|
3jaoi |
|
8 |
7
|
com3l |
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