ملخص
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.
اللغة الأصلية | الإنجليزيّة |
---|---|
الصفحات (من إلى) | 129-168 |
عدد الصفحات | 40 |
دورية | Journal of Approximation Theory |
مستوى الصوت | 147 |
رقم الإصدار | 2 |
المعرِّفات الرقمية للأشياء | |
حالة النشر | نُشِر - أغسطس 2007 |
ملاحظة ببليوغرافية
Funding Information:Research supported by NSF Grant DMS 0400446 and US-Israel BSF Grant 2004353. ∗ Corresponding author. Fax: +1 404 894 4409. E-mail addresses: [email protected] (E. Levin), [email protected] (D.S. Lubinsky).