Twin positive solutions for fourth-order two-point boundary-value problems with sign changing nonlinearities.
Twin positive solutions for three-point boundary value problems of higher-order differential equations.
Twin positive solutions of a nonlinear -point boundary value problem for third-order -Laplacian dynamic equations on time scales.
Two approximation results for the parabolic singular perturbation problem
Two classical periodic problems on time scales.
Two elementary remarks on non-linear differential equations of the second order
Two iterative schemes for an -system.
Two modifications of the Leggett-Williams fixed point theorem and their applications.
Two (multi) point nonlinear Lyapunov systems associated with an th order nonlinear system of differential equations – existence and uniqueness.
Two new approaches for construction of the high order of accuracy difference schemes for hyperbolic differential equations.
Two new finite difference methods for computing eigenvalues of a fourth order linear boundary value problem.
Two notions which affected nonlinear analysis (Bernard Bolzano lecture)
General mathematical theories usually originate from the investigation of particular problems and notions which could not be handled by available tools and methods. The Fučík spectrum and the -Laplacian are typical examples in the field of nonlinear analysis. The systematic study of these notions during the last four decades led to several interesting and surprising results and revealed deep relationship between the linear and the nonlinear structures. This paper does not provide a complete survey....
Two one-step methods to solve the initial value problem
Two point boundary value problems for linear third order differential equations in the Colombeau algebra
Two point boundary value problems for operational differential equations
Two positive solutions for a nonlinear four-point boundary value problem with a p-Laplacian operator.
Two positive solutions for second-order functional and ordinary boundary-value problems.
Two separation criteria for second order ordinary or partial differential operators
We generalize a well-known separation condition of Everitt and Giertz to a class of weighted symmetric partial differential operators defined on domains in . Also, for symmetric second-order ordinary differential operators we show that where is a singular point guarantees separation of on its minimal domain and extend this criterion to the partial differential setting. As a particular example it is shown that is separated on its minimal domain if is superharmonic. For the criterion...
Two solutions for a nonlinear Dirichlet problem with positive forcing
Given a semilinear elliptic boundary value problem having the zero solution and where the nonlinearity crosses the first eigenvalue, we perturb it by a positive forcing term; we show the existence of two solutions under certain conditions that can be weakened in the onedimensional case.
Two solvable systems of coagulation equations with limited aggregations