A note on some peculiar nonlinear extremal phenomena of the Chebyshev polynomials

  title={A note on some peculiar nonlinear extremal phenomena of the Chebyshev polynomials},
  author={Holger Dette},
  • H. Dette
  • Published 7 June 1994
  • Mathematics
We consider the problem of maximizing the sum of squares of the leading coefficients of polynomials Pi1 (x),...,Pim (x) (where Pj(x) is a polynomial of degree j) under the restriction that the sup-norm of P m=1 P 2 ij (x) is bounded on the interval [−b,b] (b > 0). A complete solution of the problem is presented using duality theory of convex analysis and the theory of canonical moments. It turns out, that contrary to many other extremal problems the structure of the solution will depend heavily… 
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