Local embedding inequality for non-even exponents greater than two

Determine whether the local embedding inequality \(\int_0^1 |f(1/2+it)|^q\,dt\lesssim \|f\|_{\mathscr H^q}^q\) holds for every \(q>2\) with \(q\notin 2\mathbb N\), for Hardy-space functions of Dirichlet series.

Background

The paper discusses the local embedding inequality for Hardy spaces of Dirichlet series, which is known in the q=2q=2 case. Earlier investigations showed that the inequality fails for 1q<21\leq q<2. The unresolved range identified by the author is the set of exponents q>2q>2 that are not even integers; even exponents are excluded because the corresponding estimates are accessible through established methods.

References

The inequality is still open for q > 2, q \notin 2\mathbb{N}.

A Fejér--Riesz inequality for Dirichlet series  (2609.03855 - Perfekt, 3 Sep 2026) in Section 1, Introduction