... the set of all positive real numbers. For δ {a} ,B and δ {a} , {b},wewrite δ a, B and d a, b, respectively. Clearly, δ A, BδB, A . We appeal to the fact thatδ A, B0 if and only if A B ... pagesdoi:10.1155/2010/509658Research Article A Common End Point Theorem for Set-ValuedGeneralized ψ, ϕ-Weak ContractionMujahid Abbas1 and Dragan D−ori´c21Department of Mathematics, Centre for Advanced Studies in Mathematics, ... point and invariant approximation f or mappings satisfyinggeneralized weak contractive condition,” Fixed Point Theory and Applications, vol. 2006, Article ID 74503,7 pages, 2006.5 Q. Zhang and...