POSITIVE SOLUTIONS FOR A CLASS OF 2nTH-ORDER SINGULAR SUBLINEAR BOUNDARY VALUE PROBLEMS
一类2n阶次线性奇异边值问题的正解

This paper investigates the existence to positive solutions of singular boundary value problems for a class of $2n$th order ($n>1$) sublinear differential equations. A necessary and sufficient condition as well as uniqueness for theexistence of $C^{2n-2}0,1]$ positive solutions and $C^{2n-1}0,1]$positive solutions is given by iterative methods.