International Mathematics Research Notices (2008) Vol. 2008 : article ID rnm154, 18 pages, doi:10.1093/imrn/rnm154
published on
February 6, 2008
© The Author 2008. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permissions@oxfordjournals.org
Equivalent norms for polynomials on the sphere
Jordi Marzo and
Joaquim Ortega-Cerdà1
1 Departament de Matemàtica Aplicada i Anàlisi Universitat de Barcelona, Gran via 585, 08071 Barcelona, Spain
Correspondence: Correspondence to be sent to: jmarzo{at}mat.ub.es
We find necessary and sufficient conditions for a sequence of sets EL
d in order to obtain the inequality
where 1
p < +

,
QL is any polynomial of degree
smaller or equal than
L, µ is a doubling measure, and
the constant
Cp is independent of
L. From this description,
it follows an uncertainty principle for functions in
L2(
d).
We also consider weighted uniform versions of this result.

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