Description: Closure law for reciprocal. (Contributed by NM, 30-Apr-2005)
| Ref | Expression | ||
|---|---|---|---|
| Hypothesis | divclz.1 | |- A e. CC |
|
| Assertion | recclzi | |- ( A =/= 0 -> ( 1 / A ) e. CC ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | divclz.1 | |- A e. CC |
|
| 2 | reccl | |- ( ( A e. CC /\ A =/= 0 ) -> ( 1 / A ) e. CC ) |
|
| 3 | 1 2 | mpan | |- ( A =/= 0 -> ( 1 / A ) e. CC ) |