Description: Commutation of converse and relation exponentiation. (Contributed by Drahflow, 12-Nov-2015) (Revised by RP, 30-May-2020) (Revised by AV, 12-Jul-2024)
Ref | Expression | ||
---|---|---|---|
Hypotheses | relexpcnvd.1 | |- ( ph -> R e. V ) |
|
relexpcnvd.2 | |- ( ph -> N e. NN0 ) |
||
Assertion | relexpcnvd | |- ( ph -> `' ( R ^r N ) = ( `' R ^r N ) ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | relexpcnvd.1 | |- ( ph -> R e. V ) |
|
2 | relexpcnvd.2 | |- ( ph -> N e. NN0 ) |
|
3 | relexpcnv | |- ( ( N e. NN0 /\ R e. V ) -> `' ( R ^r N ) = ( `' R ^r N ) ) |
|
4 | 2 1 3 | syl2anc | |- ( ph -> `' ( R ^r N ) = ( `' R ^r N ) ) |