Description: Alternate definition of the class of disjoints. (Contributed by Peter Mazsa, 18-Jul-2021)
Ref | Expression | ||
---|---|---|---|
Assertion | dfdisjs | |- Disjs = { r e. Rels | ,~ `' r e. CnvRefRels } |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-disjs | |- Disjs = ( Disjss i^i Rels ) |
|
2 | df-disjss | |- Disjss = { r | ,~ `' r e. CnvRefRels } |
|
3 | 1 2 | abeqin | |- Disjs = { r e. Rels | ,~ `' r e. CnvRefRels } |