DIFFERENTIAL INEQUALITIES METHOD TO nTh-ORDER BOUNDARY VALUE PROBLEMS
نویسنده
چکیده
From Nagumo [10], there have been many accomplishments on the study of the existence of solutions for boundary value problems (BVPs) using the theory of differential inequality (cf. [1–9, 11–17]). However, for the nth-order nonlinear differential equations with the nonlinear boundary conditions, results are very few. The authors made some attempts to solve the nth-order Robin problem [14]. Now we are concerned with the nth-order nonlinear BVP: y = f t, y, y′, . . . , y(n−1),
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