Existence and nonexistence results for a class of non‐self‐adjoint fourth‐order singular boundary value problems arising in real life

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In this work, we propose the following fourth‐order non‐self‐adjoint SBVPs to investigate where is the parameter, and with respect to three different homogeneous boundary conditions. By using monotone iterative technique we show the existence of at least one solution, which depends on the parameter . We report presence of two solutions computationally. We show the sign of the both solutions and derive the estimations of the parameter which indicates the region of nonexistence. To validate the estimations of we propose an iterative technique with the help of Greens function. We place the numerical results as an evidence of our derived theoretical results.