Description: Vector subtraction belongs to subspace sum. (Contributed by NM, 15-Dec-2004) (New usage is discouraged.)
Ref | Expression | ||
---|---|---|---|
Assertion | shsvs | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | shscl | |
|
2 | 1 | a1d | |
3 | shsel1 | |
|
4 | 3 | adantrd | |
5 | shsel2 | |
|
6 | 5 | adantld | |
7 | 2 4 6 | 3jcad | |
8 | shsubcl | |
|
9 | 7 8 | syl6 | |