Lecture
A geometric vector is a directed segment. Vectors are denoted as follows: 
; where M is the starting point of the vector, P is the ending point of the vector (Fig. 1).
Fig. one
The concept of "vector" has a broader meaning. A vector is an element of a linear space, usually finite-dimensional. (For linear spaces, see [1, 3, 6].) The entire set of geometric vectors is linear space. Many mathematical objects form a linear space, for example, matrices of the same size, or polynomials. Further, by the word "vector" we always mean a geometric vector.
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