module documentation
        
        A bi-objective nondominated archive,
implemented as sorted list and with incremental update in logarithmic time.
| Class |  | 
    A sorted list of non-dominated unique objective-pairs. | 
| Function | true | 
    return a fractions.Fraction object from val. | 
  
| Variable | inf | 
    Undocumented | 
| Function | _debug | 
    return a string like printing the calling trace stack |