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We have decided to discontinue the publication of preprints on our preprint server as of 1 March 2024. The publication culture within mathematics has changed so much due to the rise of repositories such as ArXiV ( that we are encouraging all institute members to make their preprints available there. An institute's repository in its previous form is, therefore, unnecessary. The preprints published to date will remain available here, but we will not add any new preprints here.

MiS Preprint

A hierarchical extension scheme for solutions of the Wright–Fisher model

Julian Hofrichter, Tat Dat Tran and Jürgen Jost


We develop a global and hierarchical scheme for the forward Kolmogorov (Fokker-Planck) equation of the diffusion approximation of the Wright-Fisher model of population genetics. That model describes the random genetic drift of several alleles at the same locus in a population. The key of our scheme is to connect the solutions before and after the loss of an allele. Whereas in an approach via stochastic processes or partial differential equations, such a loss of an allele leads to a boundary singularity, from a biological or geometric perspective, this is a natural process that can be analyzed in detail. Our method depends on evolution equations for the moments of the process and a careful analysis of the boundary flux.

Wright-Fisher model, forward Kolmogorov equation, random genetic drift, hierarchical solution

Related publications

2016 Repository Open Access
Julian Hofrichter, Tat Dat Tran and Jürgen Jost

A hierarchical extension scheme for solutions of the Wright-Fisher model

In: Communications in mathematical sciences, 14 (2016) 4, pp. 1093-1110