K implements Kondrashov's (1985) infinite-population, infinite-sites model
for genomic mutation, tracking the proportion of the total population having i
sites homozygous for a mutation and j sites heterozygous for a mutation.
The major extension provided by K is (so far) in allowing for each of the
(i,j) bins for a given class of mutations to have its own submodel for a
class of mutations. In the simplest case (and I can't think that I'd want to
be more complex here...) this means that there are two classes of mutations
possible within individual of the population, one containing (i,j) bins and
one containing (k,l) bins with the interpretation of k and l being
identical to that for i and j, respectively.
This project has lain dormant for nearly 8 years, and is now under active development.