Appendix 2: A Primer of Vectors and Vector Spaces
A vector is a quantity that is determined by its magnitude and direction. A scalar is a quantity that is determined by its magnitude. A vector in 2 or in 3 can be represented by a line whose length is a measure of the magnitude (or length) of the vector and whose direction is the same as that of the vector. A vector represented by a line segment from A to B is often written as .
In 2 the vectors ...