... 10501008 and 60874121 and bythe Rising-Star Program Foundation of Shanghai, China Grant no. 07QA14002. The authorsare grateful to the referee and editors for their very helpful suggestions and ... ∂Pθ, b, 3.2 and i γAx >cfor all x ∈ ∂Pγ,c, ii θAx <bfor all x ∈ ∂Pθ, b, and iii Pα, a/ ∅ and αAx >afor all x ∈ ∂Pα, a. Then, the operator A has at least ... Introduction with Applications,Birkh¨auser, Boston, Mass, USA, 2001.13 F. M. Atici, D. C. Biles, and A. Lebedinsky, “An application of time scales to economics,” Mathematical and Computer Modelling,...