Description: The range of an exponentiation of a relation a subset of the relation's field. (Contributed by RP, 23-May-2020)
Ref | Expression | ||
---|---|---|---|
Assertion | relexprn | |- ( ( N e. NN0 /\ R e. V ) -> ran ( R ^r N ) C_ U. U. R ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | relexprng | |- ( ( N e. NN0 /\ R e. V ) -> ran ( R ^r N ) C_ ( dom R u. ran R ) ) |
|
2 | dmrnssfld | |- ( dom R u. ran R ) C_ U. U. R |
|
3 | 1 2 | sstrdi | |- ( ( N e. NN0 /\ R e. V ) -> ran ( R ^r N ) C_ U. U. R ) |