| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > anbi12d | Structured version Visualization version Unicode version | ||
| Description: Deduction joining two equivalences to form equivalence of conjunctions. (Contributed by NM, 26-May-1993.) |
| Ref | Expression |
|---|---|
| bi12d.1 |
|
| bi12d.2 |
|
| Ref | Expression |
|---|---|
| anbi12d |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | bi12d.1 |
. . 3
| |
| 2 | 1 | anbi1d 741 |
. 2
|
| 3 | bi12d.2 |
. . 3
| |
| 4 | 3 | anbi2d 740 |
. 2
|
| 5 | 2, 4 | bitrd 268 |
1
|
| Copyright terms: Public domain | W3C validator |