... 1},and={ϕ : ϕ(t) < 1 ∀t ∈ (0, ∞)}.TheclassΓ∞was consideredby We¸grzyk [17] (with the additional assumption that ϕ is strictly monotonic), whereasthe class Γwas introduced independently by Chang ... and∞n=1ϕn(t) < +∞for all t ∈ [0,s).242 Fixed points and coincidence points [16] K.P.R.Sastry,S.V.R.Naidu,andJ.R.Prasad,Common fixed points for multimaps in a metricspace, Nonlinear ... ∈ (0,∞].(i) If θ is an increasing self-map on [0,s)andt0∈ (0,s)issuchthat∞n=1θn(t0) < +∞,then θ(t0) <t0.236 Fixed points and coincidence points Corollary 4.20. Suppose...