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 ) ) |