A zero vector, denoted 
, is a vector of length 0, and thus has all components equal to zero. It is the additive identity of the additive group of vectors.
Zero Vector
See also
Unit Vector, Vector, Zero TensorExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Zero Vector." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/ZeroVector.html