Talk:Unit vector

@ Charles Matthews: You are of course right if you say that the unit vector is not an identity of the multiplication, however it should be mentioned that it plays such a important role as does the null vector (which seems superflous for newcomers) because the unit vector is required to satisfy the rules of a mathemtical group and thus makes it an algebra in the first place. The same goes for the null vector. I would really appreciate it, if you could add this to both entries in terms that satisfy the otherwise strong mathemtical context, and i suppose you as a mathematican could do so best.--Slicky 11:40, Sep 17, 2004 (UTC)

Sorry, this really doesn't add up. There is no such thing as the unit vector, for one thing.

Charles Matthews 11:57, 17 Sep 2004 (UTC)

I am sorry i confused something. My bad. However regarding the null vector is should be mentioned that vector1 + null-vector = vector1 (thus the null-vector is the neutral element for the vector '+'-operation in a standard vector space). And because of that a group can be build (homogen, associative, neutral element, inverse element, commutative -> thus it is even abelian). Am I still mislead? I just deem it important to mention, because at first sight the null vector would seem a bit redundant.--Slicky 19:06, Sep 17, 2004 (UTC)

I think the null vector page now says that. Charles Matthews 19:12, 17 Sep 2004 (UTC)

Uhm,just saw it, i dunno whats gotten into me today. Its just that i am tired and a bit in a messy state. I apologize for that.