We consider the following system of third-order three-point generalized right focal boundary value problems, u"(t) = λf{sub}i(t, u{sub}1(t), u{sub}2(t))···, u{sub}n(t)), t ∈ [ab], u{sub}i(a) = u{sub}i'(t{sub}i) = 0, γ{sub}iu{sub}i(b) + δ{sub}iu{sub}i"(b) = 0,. where λ > 0, i = 1,2, ···, n, a < t{sub}i < 6, γ{sub}i ≥ 0 and δ{sub}i > 0. Criteria will be developed so that the above system has a constant-sign solution for values of A that form an interval (bounded or unbounded). Explicit intervals for such A will also be presented.
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机译：我们考虑以下系统的三阶三点广义右焦点边界值问题，u“（t）=λf{sub} i（t，u {sub} 1（t），u {sub} 2（t） ）···，u {sub} n（t）），t∈[ab]，u {sub} i（a）= u {sub} i'（t {sub} i）= 0，γ{sub} iu {sub} i（b）+δ{sub} iu {sub} i“（b）= 0,。其中λ> 0，i = 1,2，···，n，a 0。将制定标准，以便上面的系统对A值形成一个区间（有界或无界）有一个常数符号解。还将显示此类A的明确间隔。
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