Vector
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Definition
A vector is a quantity having direction as well as magnitude, especially as determining the position of one point in space relative to another.
Usage
Vectors are used in physics to represent forces, velocities, and other directional quantities.
Examples
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2D vector
\vec{v} = (x, y) -
Dot product
\vec{a} \cdot \vec{b} = a_1b_1 + a_2b_2 + a_3b_3