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| Mirrors > Home > MPE Home > Th. List > biimpcd | Structured version Visualization version Unicode version | ||
| Description: Deduce a commuted implication from a logical equivalence. (Contributed by NM, 3-May-1994.) (Proof shortened by Wolf Lammen, 22-Sep-2013.) |
| Ref | Expression |
|---|---|
| biimpcd.1 |
|
| Ref | Expression |
|---|---|
| biimpcd |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | id 22 |
. 2
| |
| 2 | biimpcd.1 |
. 2
| |
| 3 | 1, 2 | syl5ibcom 235 |
1
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