Vector is: an ordered finite list of numbers
Each Elements called elements / entries...
*Unit vectors
When you proof something about vector, you should check dimension first and then element-wise.
Remeber how to proof Commutative / Associative / Left and Right distrubutive
Also Remeber rotation "+" is different compared to calculation rotation "+". The former is VECTOR Addition.
New Topic : Linear combination
Linear combination of unit vectors. Where b is n-vector and b^i is the i-th entry of b, e^i is the i-th unit vector.
*entry means : element of vector.... 그냥 각 요소에 곱해준다고 생각하면 됨.
New Topic : Inner Product
The result of innter product is "scalar" and total sum of the vector's combination.
It can applicate by various way.
First, use all of element. Next, use angle
Proof 3 Properties
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