In the parameter file in the error name-space I suggest to add a variable for extended-zone scheme: ``` Number_of_BZ = 2 ``` If Number_of_BZ = 0 then we compute the trance for time displaced observables and S_(no,no_1) (q) for the equal time correlations. This is the very same as before. If Number_of_BZ > 0 then the program will do the following for both the equal time and time displaced correlations: ``` S(q, tau) = \sum_{R} e^{-i q (R + r_no1 + r_no2)} S_{no1,no2}(R) ``` for q in ``` BZ + n b_1 + m b_2 ``` with n,m : 1... Number_of_BZ and ``` b_i a_j = 2 \pi \delta_{i,j}