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On the pointwise convergence to initial data of heat and Poisson problems for the Bessel operator (1505.03494v1)
Published 13 May 2015 in math.AP
Abstract: We find optimal integrability conditions on the initial data $f$ for the existence of solutions $e{-t\Delta_{\lambda}}f(x)$ and $e{-t\sqrt{\Delta_{\lambda}}}f(x)$ of the heat and Poisson initial data problems for the Bessel operator $\Delta_{\lambda}$ in $\mathbb{R}{+}$. We also characterize the most general class of weights $v$ for which the solutions converge a.e. to $f$ for every $f\in L{p}(v)$, with $1\le p<\infty$. Finally, we show that for such weights and $1<p<\infty$ the local maximal operators are bounded from $L{p}(v)$ to $L{p}(u)$, for some weight $u$.