Metamath Proof Explorer
Description: Inference adding three universal quantifiers to both sides of an
equivalence. (Contributed by Peter Mazsa, 10-Aug-2018)
|
|
Ref |
Expression |
|
Hypothesis |
3albii.1 |
|
|
Assertion |
3albii |
|
Proof
Step |
Hyp |
Ref |
Expression |
1 |
|
3albii.1 |
|
2 |
1
|
2albii |
|
3 |
2
|
albii |
|