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Polynomials Gone Wild
Alexander Bilik
Department of Mathematics
UCSD
Abstract
It is well known that polynomials are dense in the
continuous functions, so that given a continuous function, a uniformly
convergent sequence of polynomials exists. However, in choosing nodes
to approximate functions, it often happens that one must choose the
nodes before knowing the functions. So is there a sequence of nodes
such that, for any function, the interpolating polynomials uniformly
converge to the function? Sadly, the answer is no. I will prove this,
and also discuss various related results.
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