🚀 go-pugleaf

David Matiskella <matiskel@aa.washington.edu> wrote:

>> Definition of Vector from my Physics book:
>> 	VECTOR: Quantity having both magnitude (size [meaning speed]) and direction.
>> 
>> In other words a point is not a vector and a vector is not a point.  Also, two
>> points do not necessarily make a vector.  A vector is a point that *points*
>> somewhere
>But a point has a magnitude and direction. Point x,y,z has a magnitude 
>of sqrt(x^2+y^2+z^2) and a direction of ( x i y j z k)/magnitude where 
>i,j,k are the unit vectors. Remember when you define a point in space you 
>are referencing it to some reference point. 

A point only exists in _one_ dimension. Hence no magnitude, nor
direction, ie. a point is not a vector. (How would you measure the
length of something infintly small ?)

NjE