We present a framework for fitting the parton density functions obtained from the Monte Carlo solutions of the QCD evolution equations of various types to the F2 data. To speed up the fitting it is enough to perform the Monte Carlo simulation only once. The actual parton density functions as functions of the fitting parameters are then reconstructed by fast one-dimensional numerical integration. Such a tool is necessary in order to determine initial values for parton density functions in case of non-DGLAP Monte Carlo evolutions.
PACS numbers: 12.38.--t, 12.38.Bx, 12.38.Cy
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