Regular patch Thus, S(.r)-F(v.wm-6.B.(Y.w)M-D(w.w)M Here,D(r.)-(.w)-w-wiscalled the distance bound function of s(v,w)with respect to F(v,w). Since max D(v,w)==D(,),we have S(,1w)-F(,w)≤3M Regular patch Thus, Here, is called the distance bound function of with respect to . Since , we have 15 1 (, ) (, ) (, ) (, ) i i i vw vw B vwM DvwM δ = S F−≤ = ∑ 15 2 2 1 (, ) (, ) i i i D v w B v w v w v vw w δ = = =+ − − − ∑ S(, ) v w F(, ) v w 1 11 3 33 (, ) max ( , ) ( , ) v w Dvw D ∈Ω = = 1 3 S F (, ) (, ) vw vw M − ≤