Description: Inference associated with jarr . Partial converse of ja (the other partial converse being jarli ). (Contributed by Wolf Lammen, 20-Sep-2013)
| Ref | Expression | ||
|---|---|---|---|
| Hypothesis | jarri.1 | |- ( ( ph -> ps ) -> ch ) |
|
| Assertion | jarri | |- ( ps -> ch ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | jarri.1 | |- ( ( ph -> ps ) -> ch ) |
|
| 2 | ax-1 | |- ( ps -> ( ph -> ps ) ) |
|
| 3 | 2 1 | syl | |- ( ps -> ch ) |