# multi-objective optimization test function explanation

i took this image from a paper that describes a multi-objective optimization algorithm where UF1 is a multi-objective function to optimize. can you explain to me what J1, J2 variables and the second line mean.

• $J_1$ is the set of odd numbers between 2 and n, inclusive, and $J_2$ is the set of even numbers between 2 and n, inclusive. – Ispil Jun 14 at 23:22