The name is absent

or

dβV{^xt'^s∖z) _          1 dexp{-βVγ^xt'^sl{z]) _ δ∖z)

dz           exp(-∕JV₁^earf,sl(z))          dz               δ(z) ^,

and for the other segments,

exp(-βV^ext,sl (z)) = H{z - Ц),                   (6.40)

^j                       δ

where H(z) is the Heaviside step function. Or,

₌       1     dexp(-^^sl(^)) ₌  φ-⅜)

dz        exp(-βV_j^ext'^sl(zY dz            H(z-⅛β'     ^

For all the segments of the chains grafted to the surface at z = H and the free

polymer, the external potential due to the surface at z = 0 is

expH^¹W) = H(,z-¾            (6.42)

^j                       2

and eq. 6.41 applies.

Hence,

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