...invariance
A fourth option `contrast' is also possible but will not be discussed further in this paper.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
...variants
for example different degrees of fragmentation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
...size
for example, suppose our sub-population was of size 10 and we had one-non-dominated individual (assigned Pareto-rank 1) then its fitness would be 9, and so on.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Frank Aherne
Fri Jul 11 12:23:04 BST 1997