The usual type of vector, which can be viewed as a contravariant tensor ("ket") of tensor rank 1. Contravariant vectors are dual to one-forms ("bras," a.k.a. covariant vectors).
Contravariant Vector
See also
Bra, Covariant Vector, Contravariant Tensor, Ket, One-Form, VectorExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Contravariant Vector." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/ContravariantVector.html