Description: Necessary and sufficient condition for a coset relation to be an element of the converse reflexive relation class. (Contributed by Peter Mazsa, 30-Aug-2021)
Ref | Expression | ||
---|---|---|---|
Assertion | cosselcnvrefrels3 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cosselcnvrefrels2 | ||
2 | cossssid3 | ||
3 | 2 | anbi1i | |
4 | 1 3 | bitri |