研究三阶差分系统边值问题Δ3ui(k)+λhi(k)fi(u1(k),u2(k),…,un(k))=0,k∈[0,T],ui(0)=ui(1)=ui(T+3)=0,i=1,2,…,n.若令f0=sum from i=1 to n lim‖u‖→0 fi(u)/‖u‖且f∞=sum from i=1 to n lim‖u‖→∞ fi(u)/‖u‖,则在f0=0且f...
the Natural Science Foundation of Gansu Province of China
Very recently, we have found that the method used in our recent paper (appeared in 2005) could be extended to obtain two general series-transformation formulas for formal power series defined over the complex number...