| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > ifclda | Structured version Visualization version Unicode version | ||
| Description: Conditional closure. (Contributed by Jeff Madsen, 2-Sep-2009.) |
| Ref | Expression |
|---|---|
| ifclda.1 |
|
| ifclda.2 |
|
| Ref | Expression |
|---|---|
| ifclda |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | iftrue 4092 |
. . . 4
| |
| 2 | 1 | adantl 482 |
. . 3
|
| 3 | ifclda.1 |
. . 3
| |
| 4 | 2, 3 | eqeltrd 2701 |
. 2
|
| 5 | iffalse 4095 |
. . . 4
| |
| 6 | 5 | adantl 482 |
. . 3
|
| 7 | ifclda.2 |
. . 3
| |
| 8 | 6, 7 | eqeltrd 2701 |
. 2
|
| 9 | 4, 8 | pm2.61dan 832 |
1
|
| Copyright terms: Public domain | W3C validator |