In this paper, we investigate the existence, multiplicity and uniqueness of positive solutions for the following system of $n$th-order nonlinear boundary value problems [egin{cases} u^{(n)}(t)+f(t,u(t),v(t))=0,0展开▼
机译：在本文中，我们研究了以下$ n $阶非线性边值问题 [ begin {cases} u ^ {（n）}（t）+ f（的正解的存在性，多重性和唯一性t，u（t），v（t））= 0,0 展开▼
