Convergence-control.md

@@ -13,7 +13,16 @@ npartconveps            1.0e-6   # number of particles convergence epsilon
                                  # default=1.0e-6
 ```
 
-The solution is regarded as *converged* when all contributions to the energy satisfy `energyconvep` and particle number satisfies criteria `npartconveps`. Info about the status of convergence is printed on standard output.
+The solution is regarded as *converged* when all contributions to the energy satisfy `energyconvep` for each entry ($`E_{\textrm{ffg}}=\frac{3}{5}N\varepsilon_F`$):  
+```math
+\dfrac{|E_{\textrm{entry}}^{(i)}-E_{\textrm{entry}}^{(i-1)}|}{E_{\textrm{ffg}}}<\varepsilon_{\textrm{energy}}
+```
+and particle number satisfies criteria `npartconveps`:  
+```math
+\dfrac{|N_{\sigma}^{(i)}-N_{\sigma}^{(input)}|}{N_{\uparrow}^{(input)}+N_{\downarrow}^{(input)}}<\varepsilon_{\textrm{npart}}
+```
+
+Info about the status of convergence is printed on standard output.
 Example of a report for converged solution for input parameters:
 ```bash
 Na                      17       # requested particle number, spin-a