Metamath Proof Explorer
Description: Removes two universal quantifiers from a statement. (Contributed by Andrew Salmon, 24-May-2011)
|
|
Ref |
Expression |
|
Hypothesis |
2al2imi.1 |
|
|
Assertion |
2al2imi |
|
Proof
Step |
Hyp |
Ref |
Expression |
1 |
|
2al2imi.1 |
|
2 |
1
|
al2imi |
|
3 |
2
|
al2imi |
|