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Related to Pseudovector: Polar vector
(or axial vector), a vector in an oriented space that is transformed into the opposite vector when the orientation of the space is reversed. An example of a pseudovector is the vector product of two vectors.
a vector determined to within an arbitrary numerical factor (vector direction). For example, the homogeneous coordinates x1, x2, x3, x4 of a point in three-dimensional space with a fixed coordinate system can be considered as the components (coordinates) of a four-dimensional pseudovector.