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Index Entry
General Theory of Variables:
“In the general theory of variables it has been recognized that the set of all the variables may be divided into two classes-- (1) the class of all the inclusive variables within a given system, and (2) the class of all those operative exclusive of the system. It has been further recognized that the variables may outside the system may affect the system from outside. In varying degrees specific levels of sub-classes of these ‘background’ or outside variables are identified as parameters. This background ‘inside and outside’ concept is a two-dimensional or flat-projection concept.”
