2026/07/21 by Alessandro Cannone, Silvia Cingolani, Serena Dipierro
#math.AP
We investigate Hartree-type equations driven by a nonlocal operator Lμ, defined as a superposition of fractional Laplacians through a signed Borel measure μ. Under Berestycki-Lions type assumptions, we prove the existence of a Mountain Pass solution and show that its energy level coincides with the minimum on the Pohozaev manifold. We also establish the boundedness of non-negative solutions. The proof of this fact requires a careful use of the Sobolev embedding in the iterative argument and a delicate treatment of the integrals involved in the estimates, as well as a Kato-type inequality in our general setting. Finally, we establish a general Pohozaev identity for solutions under a suitable summability assumption.