and Applied Analysis 3 Moreover, if the pairs (f, R), (g, S), and (h, T) are weakly compatible, then f, g, h, R, S, and T have a unique common fixed point in X. Proof. First, we suppose that the subspace RX is closed inX, fX ⊆ SX, gX ⊆ TX, and two pairs of (f, R) and (g, S) satisfy common (E.A) property.Then by Definition 11 we know that, there exist two sequences {x n } and {y n } inX such tha...