anchor.diff:  
           // Implementation according to BRAIN - algortihm
           /// Generates the distribution of the isotopic abundancy
  +        /// The predicted distribution is only valid for Elements with isotopes at natural abundance
           let ofFormula (limit:int) (fml:Formula) =
               let calcP0 (fml:Formula) = 
                   fml 
  
positive.code:         let normalizeByProbSum minProb (pols: Polynomial list) = 
              let sum = 
                  pols
                  |> List.filter (fun x -> x > minProb)
                  |> List.sumBy (fun x -> x.Probability)
              pols 
              |> List.map (fun x -> {x with Probability = x.Probability/sum})
  
negative.code:             |> mergeFinePolynomial (mergeResolution)
              |> (normF minProb)
              |> powerToMw charge
  
  