Figure 6. A geometric view of the correction process, showing the tetrahedron of all nucleotide distributions.

When the true nucleotide distribution p is (1, 0, 0, 0), the limiting distribution after next generation sequencing q is along the line from p to the centroid c. Under sampling, we see nearby $\hat{q}$ which is corrected to $\hat{r}$, lying on the extension of the line from c to $\hat{q}$.