pith. sign in

arxiv: 1905.00323 · v1 · pith:7DYFS2VAnew · submitted 2019-05-01 · 🧮 math.CA

Nikolskii inequality for lacunary spherical polynomials

classification 🧮 math.CA
keywords inequalitynikolskiipolynomialssphericalknownlacunaryasymptoticcases
0
0 comments X
read the original abstract

We prove that for $d\ge 2$, the asymptotic order of the usual Nikolskii inequality on $\mathbb{S}^d$ (also known as the reverse H\"{o}lder's inequality) can be significantly improved in many cases, for lacunary spherical polynomials of the form $f=\sum_{j=0}^m f_{n_j}$ with $f_{n_j}$ being a spherical harmonic of degree $n_j$ and $n_{j+1}-n_j\ge 3$. As is well known, for $d=1$, the Nikolskii inequality for trigonometric polynomials on the unit circle does not have such a phenomenon.

This paper has not been read by Pith yet.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.