scholarly journals Multiple positive solutions of a nonlinear fourth order periodic boundary value problem

1998 ◽  
Vol 69 (3) ◽  
pp. 265-270 ◽  
Author(s):  
Lingbin Kong ◽  
Daqing Jiang
2011 ◽  
Vol 2011 ◽  
pp. 1-12
Author(s):  
Yongxiang Li

The existence results of positive solutions are obtained for the fourth-order periodic boundary value problemu(4)−βu′′+αu=f(t,u,u′′),0≤t≤1,u(i)(0)=u(i)(1),  i=0,1,2,3, wheref:[0,1]×R+×R→R+is continuous,α,β∈R,and satisfy0<α<((β/2)+2π2)2,β>−2π2,(α/π4)+(β/π2)+1>0. The discussion is based on the fixed point index theory in cones.


2008 ◽  
Vol 39 (2) ◽  
pp. 111-120 ◽  
Author(s):  
Yu Tian ◽  
Weigao Ge

In this paper, we investigate the positive solutions of periodic boundary value problem. By using critical point theory the existence of multiple positive solutions is obtained.


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