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Fundamental theorem of upper and lower solutions for a class of singular (p1,p2)-Laplacian systems
서향혜,이용훈 영남수학회 2015 East Asian mathematical journal Vol.31 No.5
We introduce the fundamental theorem of upper and lower solutions for a class of singular (p1,p2)-Laplacian systems and give the proof by using the Schauder fixed point theorem. It will play an important role to study the existence of solutions.