lightlike vector造句

Note X is a lightlike vector because x s and x r are connected by a light signal.
This is evident from the explicit transformation law discussed : like any light-like vector, " "'P " "'itself is now invariant, i . e ., all traces or effects of have disappeared . 1 = 2 = 3 = 0, in the special case discussed . ( The other similar generator, as well as it and " z " comprise altogether the little group of the lightlike vector, isomorphic to ( 2 ) .)
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