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We study the well-posedness for the inhomogeneous Hartree equation$i\partial_t u + \Delta u = \lambda(I_\alpha \ast|\cdot|^{-b}|u|^p)|x|^{-b}|u|^{p-2}u$ in $H^s$, $s\ge0$. Until recently, itswell-posedness theory has been intensively studied, focusing on solving theproblem for the critical index $p=1+\frac{2-2b+\alpha}{n-2s}$ with $0\le s \le1$, but the case $1/2\leq s \leq 1$ is still an open problem. In this paper, wedevelop the well-posedness theory in this case, especially including theenergy-critical case. To this end, we approach to the matter based on theSobolev-Lorentz space which can lead us to perform a finer analysis for thisequation. This is because it makes it possible to control the nonlinearityinvolving the singularity $|x|^{-b}$ as well as the Riesz potential $I_\alpha$more effectively.

On well-posedness for inhomogeneous Hartree equations in the critical case