Description: Cosets by R is a relation. (Contributed by Peter Mazsa, 27-Dec-2018)
Ref | Expression | ||
---|---|---|---|
Assertion | relcoss | |- Rel ,~ R |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-coss | |- ,~ R = { <. x , y >. | E. u ( u R x /\ u R y ) } |
|
2 | 1 | relopabiv | |- Rel ,~ R |