RESEARCH ON ORDINARY DIFFERENTIAL EQUATION AND …
www.m-hikari.com/quhaidong.pdfOrdinary di erential equations This chapter contains three papers which are on the integer-order ordinary di erential equations for boundary value problem. 1.1 The symmetric positive solutions of four-point boundary value problems for nonlin-ear second-order di erential equations Abstract: In this paper, we are concerned with the existence of ...