Abstract
We obtain estimates for Christoffel functions and orthogonal polynomials for even weights W : R → [0, ∞) that are 'close' to indeterminate weights. Our main example is exp fenced(- || fenced(x) fenced(log || fenced(x))β), with β real, possibly modified near 0, but our results also apply to exp fenced(- || fenced(x)α fenced(log || fenced(x))β), α < 1. These types of weights exhibit interesting properties largely because they are either indeterminate or are close to the border between determinacy and indeterminacy in the classical moment problem.
| Original language | English |
|---|---|
| Pages (from-to) | 129-168 |
| Number of pages | 40 |
| Journal | Journal of Approximation Theory |
| Volume | 147 |
| Issue number | 2 |
| DOIs | |
| State | Published - Aug 2007 |
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