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What is the difference between a vector $pq$ and an equation of vector $pq$?

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please provide more details. what do you mean by "equation of vector pq"? –  Eric O. Korman Jan 15 '11 at 17:06
    
What does $pq$ mean? –  Rasmus Jan 15 '11 at 19:42

1 Answer 1

A vector is an element of a vector space. A vector equation, which is what you might mean, is simply an equation involving vectors. For instance, the vector equation $r=a+\lambda b$ with $\lambda\in R$ describes a line.

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