Metamath Proof Explorer
Description: Two ways to express the negative of a vector. (Contributed by NM, 31-Oct-1999) (New usage is discouraged.)
|
|
Ref |
Expression |
|
Hypothesis |
hvaddid2.1 |
|
|
Assertion |
hv2negi |
|
Proof
Step |
Hyp |
Ref |
Expression |
1 |
|
hvaddid2.1 |
|
2 |
|
hv2neg |
|
3 |
1 2
|
ax-mp |
|