Given a set P of points in the plane, a set of points Q is a weak ε-net with respect to a family of sets SS (e.g., rectangles, disks, or convex sets) if every set of SS containing ε|P|ε|P| points contains a point of Q . In this paper, we determine bounds on <img height="18" border="0" style="vertical-align:bottom" width="17" alt="View the MathML source" title="View the MathML source" src="http://origin-ars.els-cdn.com/content/image/1-s2.0-S0925772108001168-si4.gif">εiS, the smallest epsilon that can be guaranteed for any P Fake Uggs Uk For Sale
when |Q|=i|Q|=i, for small values of i.
The present paper gives a brief review of the status of electromagnetic isotope separation techniques in the former USSR. It describes the basic specifications of the equipment as well as the general scheme of the production process, and considers Cheap Uggs Uk Genuine questions relating to the chemical processing of isotopic material and analytical control techniques. Finally, a summary is given of the main separation data obtained during the last ten years, and the prospects of future development and of enhancing the economical effectiveness of isotope production are discussed.