A scalar is a one-component quantity that is invariant under rotations of the coordinate system.
Scalar
See also
Pseudoscalar, Scalar Field, Scalar Function, Scalar Matrix, Scalar Multiplication, Scalar Potential, Scalar Triple Product, Tensor, Vector Explore this topic in the MathWorld classroomExplore with Wolfram|Alpha
References
Jeffreys, H. and Jeffreys, B. S. "Scalars and Vectors." Ch. 2 in Methods of Mathematical Physics, 3rd ed. Cambridge, England: Cambridge University Press, pp. 56-85, 1988.Referenced on Wolfram|Alpha
ScalarCite this as:
Weisstein, Eric W. "Scalar." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Scalar.html