檢視 $currentprecision 的原始碼

$currentprecision is the command to set the current convergence criteria. Usually the DDCC program solve the program until the error is smaller than [[$error]]. The [[$error]] is from the potential error where <math> \Delta Ec < $error </math>. However, when the currentprecission is set, the program will also request the simulation program to get current density error in each iteration smaller than the $currentprecision. 
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<math> \frac{ (J_{i+1}-J_{i} ) }{ J_{i}} < </math> $currentprecision 

 $currentprecision
 1.0e-3