Re: evolving 2+ variables simultaneously?

You have to differ multi objective optimitazion from some complex
genome.

Multiple objective optimization is something like:
evalfunction1(genome)
evalfunction2(genome)
evalfunction3(genome)
etc.
Genome in this case can be as simple as a single number.


Complex genome would be something like:
some permutation of numbers | some number
and you evaluate it with your function... and just make complex
mutation/reproduction functions in which it is possible for example:
crossover between the two parts of genome
some cyclic crossover of first parts if you have some pertmutation
encoded thing
simple mutation of the number
etc...

.