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Oscillation of functional differential equations
(Elsevier BV, 2005-02-01)
Some new criteria for the oscillation of functional differential equations of the form,
d/dt[1/a(n-1)(t) d/dt q (t) f (x [g (t)]) = 0, dt a._1 (t) Tt -a,,-2 (t) Tt -al(t) dt
are presented in this paper. @ 2005 Elsevier ...
Construction of upper and lower solutions for singular discrete initial and boundary value problems via inequality theory
(Springer Nature, 2005-01-01)
We present new existence results for singular discrete initial and boundary value problems. In particular our nonlinearity may be singular in its dependent variable and is allowed to change sign.
Twin positive periodic solutions of second order singular differential systems
(Uniwersytet Mikolaja Kopernika/Nicolaus Copernicus University, 2005-06-01)
In this paper, we study positive periodic solutions to singular second order differential systems. It is proved that such a problem has at least two positive periodic solutions. The proof relies on a nonlinear alternative ...
Solvability of singular second order m-point boundary value problems
(Elsevier BV, 2005-01-01)
Constant-sign periodic and almost periodic solutions of a system of difference equations
(Elsevier BV, 2005-11-01)
Solvability of singular dirichlet boundary-value problems with given maximal values for positive solutions
(Cambridge University Press (CUP), 2005-02-01)
The singular boundary-value problem (g(x'(t)))' = muf (t, x(t), x'(t)), x(0) = x(T) = 0 and max {x(t) : 0 less than or equal to t less than or equal to T} = A is considered. Here p is the parameter and the negative function ...
Singular positone and semipositone boundary value problems of second order delay differential equations
(Institute of Mathematics, Czech Academy of Sciences, 2005-06-01)
In this paper we present some new existence results for singular positone and semipositone boundary value problems of second order delay differential equations. Throughout our nonlinearity may be singular in its dependent ...
Fourth-order problems with nonlinear boundary conditions
(Elsevier BV, 2005-02-01)