Adrian S. Lewis (Lewis, Adrian S.)

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  Convex Analysis And Nonlinear Optimization: Theory And Examples
  by Adrian S. Lewis, Borwein
  Hardcover, Springer Verlag, ISBN 0387295704 (0-387-29570-4)
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  Convex Analysis and Nonlinear Optimization: Theory and Examples
  by Jonathan Borwein, Adrian S. Lewis
  Hardcover, Springer Verlag, ISBN 0387989404 (0-387-98940-4)