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    • Evolution of an extremum by curvature motion 

      Craizer, Marcos; Teixeira, Ralph Costa
      2004
      In this paper we consider the evolution of an isolated extremum of a function under the curvature motion in the plane. We define different notions of circular extrema and show that, immediately after the motion begins, the ...
    • A numerical scheme for the curvature equation near the singularities 

      Craizer, Marcos; Pesco, Sinesio; Teixeira, Ralph Costa
      2005
      In this paper we propose a modification in the usual numerical method for computing the solutions of the curvature equation in the plane . This modification takes place near the singularities of the image. We propose to ...