Lakshmikantham, V.(University of Texas at Arlington, 1982-05)
**Please note that the full text is embargoed** ABSTRACT: We consider the first and second order periodic boundary value problems (PBVP for brevity)[see pdf for notation] and [see pdf for notation]and obtain
the existence ...
Lakshmikantham, V.; Kannan, R.(University of Texas at Arlington, 1981-11)
**Please note that the full text is embargoed** ABSTRACT: We study the existence of periodic solutions of second order nonlinear differential equations by combining the method of upper and lower solutions and the method ...