2 Approximate formulae for F

Exercise 4.1.4 Let S be a c la im size d.f. Define equidistant d.f.s L

(L for left) and R (R for right) wi th step length C as follows:

R(Z) = S((i - 1)'C) for (i -1)C^Z< i-C,

L(Z) = S(vC) for ( i - l ) - C ^ Z < r C .