Metamath Proof Explorer
Description: Definition of a 2-hypothesis virtual deduction. (Contributed by Alan
Sare, 14-Nov-2011) (New usage is discouraged.)
|
|
Ref |
Expression |
|
Assertion |
df-vd2 |
|
Detailed syntax breakdown
Step |
Hyp |
Ref |
Expression |
0 |
|
wph |
|
1 |
|
wps |
|
2 |
|
wch |
|
3 |
0 1 2
|
wvd2 |
|
4 |
0 1
|
wa |
|
5 |
4 2
|
wi |
|
6 |
3 5
|
wb |
|