Browsing Documentos indexados pela Scopus by Author "Teixeira, Ralph Costa"

Now showing items 1-3 of 3

    • 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 geometric representation of improper indefinite affine spheres with singularities 

      Craizer, Marcos; Teixeira, Ralph Costa; Silva, Moacyr Alvim Horta Barbosa da
      2011
      Given a pair of planar curves, one can define its generalized area distance, a concept that generalizes the area distance of a single curve. In this paper, we show that the generalized area distance of a pair of planar ...

    • 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 ...