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.

Categories: math.CA

Nikolskii inequality for lacunary spherical polynomials