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Fixed point theorems for a class of nonlinear sum-type operators and its application to fractional q-difference equations*

机译:一类非线性和型运算符及其在分数Q差分方程的应用程序的定点定理*

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In this paper, we investigate the operator equation $A(x, x)+B(x, x)+C(x, x)+Dx+Ex=x$, in which A, B, C are three mixed monotone operators with different characters, D is an increasing operator, and E is a decreasing operator. The main difficulty in dealing with the sum of five operators is the proving of concavity of the sum-type operator, which produces more complexities than the sum of two or three operators. Our goal is to obtain the unique existence of positive solutions under some appropriate conditions by virtue of a fixed point theorem for mixed monotone operators. At last, we give an application to demonstrate the efficiency of our abstract result.
机译:在本文中,我们研究了操作员方程 $ a(x, x )+ b(x, x)+ c(x, x)+ dx + ex = x $ ,其中A,B,C是具有不同字符的三个混合的单调运算符,D是越来越多的操作员,并且E是减少操作员。处理五个运营商的总和的主要困难是证明总和型运营商的凹版,这比两三个或三个运营商的总和产生更多复杂性。我们的目标是通过混合单调运营商的固定点定理来获得一些适当的条件下的积极解决方案的独特存在。最后,我们给出了申请来展示我们抽象结果的效率。

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