Gabriel's problem for harmonic Hardy spaces

Suman Das

We obtain inequalities of the form $${\int }_C|f(z){|}^p|dz|\le A(p){\int }_{\mathbb{T}}|f(z){|}^p|dz|,(p>1)$$ where $f$ is harmonic in the unit disk $\mathbb{D}$, $\mathbb{T}$…