Abstract. The sufficient condition for the existence of 2π-periodic solutions of the following third-order functional differential equations with variable coef
A fishing model with stage structure in inshore and offshore areas is considered.Steady states of the dynamical system representing tishery are derived and thei
It is shown that any fixed point of a Lipschitzian,strictly pseudocontractive muping T on a closed convex subset K of a Banach space X may be approximated by Is
By means of continuation theorem of the coincidence degree theory, sufficient conditions are obtained for the existence of periodic solutions of a kind of third