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We consider α set as a generalization of convex sets. In this paper it is proved that the distance from α-set to its convex hull in the Hausdorff metric is small. An estimate of this distance depending on the value of α.
The transverse distribution of the plasma temperature in the positive column of a d.c. cascade arc in argon at atmospheric pressure has been measured. The measurements have been carried out by the conventional method involving the determination of the emissivity of plasma as well as directly from the radiation spectrum of the arc without recourse to the Abelian inversion. A theoretical and model justification...
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