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In this paper we deal with the four-point singular boundary value problem $\{\begin{matrix} {(φ_{p} (u^{'} (t)))}^{'} + q (t) f (t, u (t), u^{'} (t)) = 0, & t \in (0, 1), \\ u^{'} (0) - α u (ξ) = 0, u^{'} (1) + β u (η) = 0, \end{matrix}$ where $φ_{p} (s) = {| s |}^{p - 2} s$ , $p > 1$ , $0 < ξ < η < 1$ , $α, β > 0$ , $q \in C [0, 1]$ , $q (t) > 0$ , $t \in (0, 1)$ , and $f \in C ([0, 1] \times (0, + \infty) \times ℝ, (0, + \infty))$ may be singular at $u = 0$ . By using the well-known theory of the Leray-Schauder degree, sufficient conditions are given for the existence of positive solutions.

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Existence and multiplicity of solutions for some three-point nonlinear boundary value problems.

Existence and multiplicity results for singular $φ$ -Laplacian BVPs on the positive half-line.

Existence and uniqueness of positive solution for a singular nonlinear second-order $m$ -point boundary value problem.

Existence and uniqueness of positive solution for singular BVPs on time scales.

Existence and uniqueness of smooth positive solutions to a class of singular $m$ -point boundary value problems.

Existence and uniqueness of solutions for boundary value problems to the singular one-dimension $p$ -Laplacian.

Existence and uniqueness of solutions for singular higher order continuous and discrete boundary value problems.

Existence criteria for singular boundary value problems with $p$ -Laplacian operators.

Existence of a positive solution to a right focal boundary value problem.

Existence of countably many positive solutions for $n$ th-order $m$ -point boundary-value problems on time scales.

Existence of nonnegative solutions of singular boundary-value problems for second-order ordinary differential equations.

Existence of positive solutions for a class of $m$ -point boundary value problems.

Existence of positive solutions for a singular $p$ -Laplacian Dirichlet problem.

Existence of positive solutions for boundary-value problems for singular higher-order functional differential equations.

Existence of positive solutions for nth-order boundary value problem with sign changing nonlinearity.

Existence of positive solutions for singular eigenvalue problems.

Existence of positive solutions for singular four-point boundary value problem with a $p$ -Laplacian

Existence of positive solutions for singular fractional differential equations.

Existence of positive solutions for singular second order boundary value problems.

Existence of positive solutions of a singular nonlinear boundary value problem.

Currently displaying 21 – 40 of 164