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Mathematical definition of direction?

  1. Jan 20, 2008 #1
    what is the mathematical definition of direction ?

    is it always associated with movement or transfer ?

    if not then what is the meaning of initial and final point in the definition of directed line segment?
  2. jcsd
  3. Jan 20, 2008 #2


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    Since neither movement nor transfer is a "mathematical term", no, direction is not mathematically defined in terms of them. "Direction" is defined as a ray- that part of a line segment on one side of a given point. Of course, "on one side of" is just defined as "a point divides a segment into two parts: choose either of them."

    I apparently don't understand your last question. I don't see what it has to do with "if not". A "directed" line segment starts with a line segment. Then you choose one of the end points as the 'base' for the ray that determines the direction. Neither movement nor transfer required there.
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