Differential Equations & Applications · Volume 9, Issue 4 Multiple positive solutions for a Choquard equation involving both concave-convex and Hardy-Littlewood-Sobolev critical exponent 09-34 Pages 505-520 DOI 10.7153/dea-2017-09-34 Downloads Short PDF Full PDF PNG Authors R. Echarghaoui M. Khiddi S. M. Sbai Keywords Choquard equation 𝒩ehari manifold concave and convex nonlinearities Lusternik-Schnirelman category Subject classes 35J25 35J60 35A15