Description: Obsolete form of relcnvtrg as of 8-Aug-2026. (Contributed by FL, 19-Sep-2011) (Proof shortened by Peter Mazsa, 17-Oct-2023) (Proof modification is discouraged.) (New usage is discouraged.)
| Ref | Expression | ||
|---|---|---|---|
| Assertion | relcnvtrOLD | |- ( Rel R -> ( ( R o. R ) C_ R <-> ( `' R o. `' R ) C_ `' R ) ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 3anidm | |- ( ( Rel R /\ Rel R /\ Rel R ) <-> Rel R ) |
|
| 2 | relcnvtrgOLD | |- ( ( Rel R /\ Rel R /\ Rel R ) -> ( ( R o. R ) C_ R <-> ( `' R o. `' R ) C_ `' R ) ) |
|
| 3 | 1 2 | sylbir | |- ( Rel R -> ( ( R o. R ) C_ R <-> ( `' R o. `' R ) C_ `' R ) ) |