Description: Sufficient condition for a restricted converse epsilon range Cartesian product to be a set. (Contributed by Peter Mazsa, 23-Sep-2021)
Ref | Expression | ||
---|---|---|---|
Assertion | 1cossxrncnvepresex |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | xrncnvepresex | ||
2 | cossex | ||
3 | 1 2 | syl |