Metamath Proof Explorer
Description: .~ is a relation. (Contributed by Alexander van der Vekens, 25-Mar-2018) (Revised by AV, 29-Apr-2021)
|
|
Ref |
Expression |
|
Hypothesis |
erclwwlk.r |
|
|
Assertion |
erclwwlkrel |
|
Proof
Step |
Hyp |
Ref |
Expression |
1 |
|
erclwwlk.r |
|
2 |
1
|
relopabi |
|