Next: The partition
Up: Detailed Derivation of the
Previous: The Integration
To extract we now need to trace over the environmental variables, i.e. average out the environmental degrees of freedom. We can most quickly see that,

(4.1) 
as is linear with and
,
,
and it is self evident that
Thus we are left with,

(4.2) 
To proceed from here will require some care.
Subsections
Timothy Jones
20061011