Keywords: راه حل های پایین و بالا; 35J25; 35J62; Quasilinear elliptic equations; Quadratic growth in the gradient; Lower and upper solutions;
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Keywords: راه حل های پایین و بالا; Chemotaxis; Stability; Steady state; Lower and upper solutions
Keywords: راه حل های پایین و بالا; Fractional differential equations; Boundary value problems; Maximum principle; Lower and upper solutions; Caputo fractional derivative
Keywords: راه حل های پایین و بالا; Fourth order boundary value problem; Maximum principles; Lower and upper solutions; 34B27; 34B15; 34B05; 34A40;
Keywords: راه حل های پایین و بالا; Fractional differential equations with boundary conditions; Monotone iterative method; Lower and upper solutions; Existence of solutions; Mittag-Leffler functions
Keywords: راه حل های پایین و بالا; Laminar flow; Lower and upper solutions
Keywords: راه حل های پایین و بالا; boundary value problems; positive solutions; lower and upper solutions; comparison theorem34B16
The method of lower and upper solutions for mixed fractional four-point boundary value problem with p-Laplacian operator
Keywords: راه حل های پایین و بالا; Fractional differential equation; Mixed fractional derivatives; Four-point boundary value problem; Positive solution; p-Laplacian operator; Lower and upper solutions;
On a singular periodic Ambrosetti-Prodi problem
Keywords: راه حل های پایین و بالا; 34C25; Periodic solutions; Multiplicity results; Lower and upper solutions; Singularities; Rotating solutions;
Periodic solution of differential equation with Ï-Laplacian and state-dependent impulses
Keywords: راه حل های پایین و بالا; Ï-Laplacian; State-dependent impulses; Periodic solution; Existence; Lower and upper solutions; Lower and upper functions;
Monotone iterative technique for the elastic systems with structural damping in Banach spaces
Keywords: راه حل های پایین و بالا; Mild solutions; Elastic systems; Structural damping; Lower and upper solutions; Measure of noncompactness
Periodic and Neumann problems for discrete p(â
)-Laplacian
Keywords: راه حل های پایین و بالا; Discrete p(â
)-Laplacian operator; Critical point; Palais-Smale condition; Lower and upper solutions;
Perturbation method for nonlocal impulsive evolution equations
Keywords: راه حل های پایین و بالا; Nonlocal impulsive evolution equation; Lower and upper solutions; Perturbation method; Monotone iterative technique; Mild and classical solutions; C0C0-semigroup
Existence and asymptotic stability of periodic solutions with an interior layer of reaction–advection–diffusion equations
Keywords: راه حل های پایین و بالا; Singularly perturbed parabolic periodic problems; Exponential asymptotic stability; Krein–Rutman theorem; Lower and upper solutions
Discontinuous functional differential equations with delayed or advanced arguments
Keywords: راه حل های پایین و بالا; Discontinuous differential equations; Deviated arguments; Boundary value problems; Lower and upper solutions
Upper and lower solutions method for regular singular differential equations with quasi-derivative boundary conditions
Keywords: راه حل های پایین و بالا; Monotone iterative technique; Lower and upper solutions; Quasi derivative; Pseudo derivative; Regular singular point
Impulsive fractional differential equations with nonlinear boundary conditions
Keywords: راه حل های پایین و بالا; Fractional differential equation; Nonlinear boundary conditions; Lower and upper solutions; Monotone iterative technique
On higher order fully periodic boundary value problems
Keywords: راه حل های پایین و بالا; Periodic problems; Lower and upper solutions; Nagumo-type condition; Degree theory
Monotone iterative methods for infinite systems of parabolic functional differential equations
Keywords: راه حل های پایین و بالا; 35R10; 35K51; Regular solutions; Lower and upper solutions; Method of direct iterations; Chaplygin sequences;
Multiple solutions of impulsive Sturm–Liouville boundary value problem via lower and upper solutions and variational methods
Keywords: راه حل های پایین و بالا; Multiple solutions; Impulsive Sturm–Liouville boundary value problem; Critical point; Lower and upper solutions; Variational methods
Existence, regularity and stability properties of periodic solutions of a capillarity equation in the presence of lower and upper solutions
Keywords: راه حل های پایین و بالا; Quasilinear ordinary differential equation; Prescribed curvature equation; Capillarity equation; Periodic problem; Bounded variation function; Existence; Lower and upper solutions; Regularity; Order stability; Lyapunov instability
Ground state periodic solutions for difference equations with discrete p-Laplacian
Keywords: راه حل های پایین و بالا; Discrete p-Laplacian operator; Critical point; Palais-Smale condition; Lower and upper solutions;
Boundary value problems for difference equations with causal operators
Keywords: راه حل های پایین و بالا; Difference equations with causal operators; Difference inequalities with causal operators; Lower and upper solutions; Monotone iterative method; Existence of solutions;
Monotone iterative sequences for nonlinear integro-differential equations of second order
Keywords: راه حل های پایین و بالا; Nonlinear integro-differential equations; Maximum principle; Monotone method; Lower and upper solutions
Monotone iterative sequences for nonlinear boundary value problems of fractional order
Keywords: راه حل های پایین و بالا; 34A08; 34Bxx; 35J40Fractional differential equations; Boundary value problems; Maximum principle; Lower and upper solutions; Caputo fractional derivative
The monotone iterative method and zeros of Bessel functions for nonlinear singular derivative dependent BVP in the presence of upper and lower solutions
Keywords: راه حل های پایین و بالا; Monotone iterative technique; Lower and upper solutions; Neumann boundary conditions; Bessel functions
Systems of first order impulsive functional differential equations with deviating arguments and nonlinear boundary conditions
Keywords: راه حل های پایین و بالا; Systems of impulsive functional differential equations; Nonlinear boundary conditions; Monotone iterative method; Deviating arguments; Lower and upper solutions
Positive solutions for a mixed and singular quasilinear problem
Keywords: راه حل های پایین و بالا; 35J25; 35J20; 35J67pp-Laplacian; Lower and upper solutions; Singular problems; Sub-linear and super-linear terms
Positive solutions of fourth order problems with clamped beam boundary conditions
Keywords: راه حل های پایین و بالا; 34B27; 34B15; 34B05; 34A40Clamped beam; Fourth order boundary value problem; Maximum Principles; Lower and upper solutions
Nonlinear second-order equations with functional implicit impulses and nonlinear functional boundary conditions
Keywords: راه حل های پایین و بالا; primary, 34B37; secondary, 34B15, 34B27Boundary value problem; Impulses; Lower and upper solutions; Functional dependence; Compatible impulses; φφ-Laplacian
Multiple solutions of Sturm–Liouville boundary value problem via lower and upper solutions and variational methods
Keywords: راه حل های پایین و بالا; 34B15; 35A15Multiple solutions; Sturm–Liouville boundary value problem; Critical point; Lower and upper solutions; Variational methods
Existence of maximal and minimal periodic solutions for first-order functional differential equations
Keywords: راه حل های پایین و بالا; First-order functional differential equations; Lower and upper solutions; Maximal and minimal periodic solutions; Existence; Fixed point
First-order functional difference equations with nonlinear boundary value problems
Keywords: راه حل های پایین و بالا; Difference equations with delayed arguments; Difference inequalities; Lower and upper solutions; Monotone method; Existence of solutions
First-order advanced difference equations
Keywords: راه حل های پایین و بالا; Difference equations with advanced arguments; Difference inequalities; Lower and upper solutions; Monotone method; Existence of solutions
Existence and nonexistence of ground state solutions for elliptic equations with a convection term
Keywords: راه حل های پایین و بالا; primary, 35J60, 35B25; secondary, 35R05Quasilinear equations; Lower and upper solutions; Convection
Higher order boundary value problems with nonhomogeneous boundary conditions
Keywords: راه حل های پایین و بالا; primary, 34B15; secondary, 34B18Positive solutions; Boundary value problems; Spectral radius; Lower and upper solutions; Fixed point index
Positive solutions of the Dirichlet problem for the prescribed mean curvature equation
Keywords: راه حل های پایین و بالا; 35J25; 35J20; 35J60; 53A10; 49Q20Prescribed mean curvature equation; Bounded variation solution; Weak solution; Strong solution; Positive solution; Existence; Multiplicity; Variational methods; Lower and upper solutions; Regularization
Boundary value problems for differential equations with deviated arguments which depend on the unknown solution
Keywords: راه حل های پایین و بالا; Monotone iterations; Quasisolutions; Lower and upper solutions;
Existence and uniqueness of solutions for a fourth-order boundary value problem
Keywords: راه حل های پایین و بالا; Fourth-order boundary value problem; Lower and upper solutions; Nagumo condition; Integral–differential equation; Existence and uniqueness
Positive solutions for boundary value problems of nonlinear fractional differential equation
Keywords: راه حل های پایین و بالا; 26A33; 34B18; 34B27Fractional boundary value problem; Fixed-point theorem; Positive solution; Lower and upper solutions
The method of lower and upper solutions for 2n2nth-order multi-point boundary value problems
Keywords: راه حل های پایین و بالا; Multi-point boundary value problem; Iterative solution; Lower and upper solutions
Existence results for some fourth-order multi-point boundary value problem
Keywords: راه حل های پایین و بالا; Fourth-order boundary value problem; Multi-point boundary value conditions; Lower and upper solutions; Nagumo condition
Infinitely many positive solutions of a singular dirichlet problem involving the p-Laplacian
Keywords: راه حل های پایین و بالا; 02.30Hq; 02.30Xx34B15Critical point theory; Lower and upper solutions; Positive solutions; Singular dirichlet problem; p-Laplacian
Triple positive solutions for nonlinear boundary value problems in Banach space
Keywords: راه حل های پایین و بالا; Strict-set-contractions; Lower and upper solutions; Boundary value problem; Banach spaces
Multiple solutions of singular three-point boundary value problems on [0,∞)[0,∞)
Keywords: راه حل های پایین و بالا; 45J05; 34k30Three point; Multiple solutions; Lower and upper solutions; Topological degree; Half-line
Necessary and sufficient conditions for the existence of quasi-symmetric positive solutions of singular boundary value problem
Keywords: راه حل های پایین و بالا; Lower and upper solutions; Necessary and sufficient condition; Three-point boundary value problem; Schauder fixed point theorem; Quasi-symmetric
Extremal solutions to fourth-order functional boundary value problems including multipoint conditions
Keywords: راه حل های پایین و بالا; Functional and multipoint boundary value problems; Nagumo condition; Lower and upper solutions; Extremal solutions
Nonhomogeneous boundary value problems for some nonlinear equations with singular ϕ-Laplacian
Keywords: راه حل های پایین و بالا; ϕ-Laplacian; Nonhomogeneous Dirichlet problem; Nonlinear Neumann–Steklov problem; Leray–Schauder degree; Lower and upper solutions; Ambrosetti–Prodi problem
Multiplicity of solutions to two-point boundary value problems for second-order impulsive differential equations
Keywords: راه حل های پایین و بالا; Boundary value problem; Impulsive differential equations; Nagumo’s condition; Lower and upper solutions; Leray–Schauder degree; Multiple solutions
Monotone iterative method for first-order functional difference equations with nonlinear boundary value conditions
Keywords: راه حل های پایین و بالا; Functional difference equations; Lower and upper solutions; Monotone iterative method; Nonlinear boundary value conditions