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| Mirrors > Home > ILE Home > Th. List > jca | Unicode version | ||
| Description: Deduce conjunction of the consequents of two implications ("join consequents with 'and'"). (Contributed by NM, 5-Aug-1993.) (Proof shortened by Wolf Lammen, 25-Oct-2012.) |
| Ref | Expression |
|---|---|
| jca.1 |
|
| jca.2 |
|
| Ref | Expression |
|---|---|
| jca |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | jca.1 |
. 2
| |
| 2 | jca.2 |
. 2
| |
| 3 | pm3.2 139 |
. 2
| |
| 4 | 1, 2, 3 | sylc 62 |
1
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