id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
ejde-82	Feng, Meiqiang; Chen, Haiping	Existence and nonexistence of positive solutions for fourth-order elliptic problems	2023	16	.pdf	application/pdf	6199	384	81	New criteria for the existence and nonexistence of positive solution are established under some sublinear conditions which involve the principal eigenvalues of the corresponding linear problems. [23] used a variant version of Mountain Pass Theorem to demonstrate the existence and nonexistence of positive solution for the fourth-order elliptic prob- lem ∆2u = f(x, u) in Ω, u = ∆u = 0 on ∂Ω, where Ω denotes a smooth bounded domain in Rn (n > 4).	cache/ejde-82.pdf	txt/ejde-82.txt