p-optimal, specifies error criteria for calculating musical temperament tunings, as described in more detail below.
p-optimal. For some p, 2 <= p <= infinity, we have that the generator is optimal for unweighted pth powers of the absolute values of the errors.
After generating the graph, i decided to attempt to localize the minimum, and it appears that it occurs at p=2.8149, where the optimal generator is ~696.1146 cents. Any generator between that and the 1/4-comma meantone generator ~696.5784 cents is therefore poptimal for meantone ... that is, if you weight all the 5-limit consonance equally . . .