null vector

(redirected from Non-zero vector)

null vector

[′nəl ′vek·tər]
(mathematics)
A vector whose invariant length, that is, the sum over the coordinates of the vector space of the product of its covariant component and contravariant component, is equal to zero.
(relativity)
In special relativity, a four vector whose spatial part in any Lorentz frame has a magnitude equal to the speed of light multiplied by its time part in that frame; a special case of the mathematics definition.
References in periodicals archive ?
And here's some linear algebra, for those not listening at the back: "A scalar lambda for which there exists a non-zero vector V such that M multiplied by V equals lambda times V.
For a non-zero vector x [member of] V \ {0}, let [?
The proof is based on the fact that a number k is an eigenvalue of A if A times X is equal to k times X for some non-zero vector X.
Then a non-zero vector (x,y) is referred to as a proper vector (eigenvector, characteristic vector) of A if it satisfies the equation