On one Question of

نویسندگان

  • Ed Sa
  • Boris Shekhtman
چکیده

In relation to Fourier-Pade approximation, Ed Sa¤ observed that Taylor and Lagrange interpolation projections satisfy the following property: P (f) P (g) 2 n =) P (f g) = P (f) P (g). We classify all projections that satisfy this property, thus answering a question of Sa¤. Some error formulas for approximation with the above mentioned projections are also produced. AMS Subject Classi…cation: 41A05, 41A10, 41A45, 41A80

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تاریخ انتشار 2006