Description: Inference for combining cases. (Contributed by NM, 29-Jul-1999) (Proof shortened by Wolf Lammen, 6-Jan-2013)
Ref | Expression | ||
---|---|---|---|
Hypotheses | ccase.1 | |
|
ccase.2 | |
||
ccase.3 | |
||
ccase.4 | |
||
Assertion | ccase | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ccase.1 | |
|
2 | ccase.2 | |
|
3 | ccase.3 | |
|
4 | ccase.4 | |
|
5 | 1 2 | jaoian | |
6 | 3 4 | jaoian | |
7 | 5 6 | jaodan | |