Abstract. By means of the analysis, convex geometry, computer and majorization theories, in the centered 2 -surround system S (2) {P,Γ,l} , we establish the following mean central distancecentral distance inequalities:where τ = 2.49342812654089 ... , and τ/2 is the unique real root of the following equation:We also demonstrate the applications of our results, and obtain the N -mean central distancecentral distance inequality and the mean central distance-central distance-limit inequality.Mathematics subject classification (2010): 26D15, 26E60, 51K05, 52A40.