Normal component of stress tensor

To eveduate the partial derivative of the configuration integral in Eq. (5.62). we employ an approach suggested by Hill [21] and transform coordinates according to [see also Eq. (5.7)] 

A different expression for T,z can be obtained directly from Eq. (5.62) without the transformation of coordinates. Therefore, it is convenient to recast the configuration integral as [329] 

This permits us to recast the previoiu expression as [sec Eq. (5.69)] fceT 1 / fxi f 

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