find supremum and infimum program matlab

Hello, everyone I would like to estimate parameter but in function must to find inf and sup please help me for write code program matlab

[Guillaume]

This is way outside of my area of expertise, but I'm fairly certain that there is no general algorithm to find the supremum and infimum of a set (unless that set and the superset where the supremum and infimum come from are both finite of course).

[Boonanan Lechayakittikorn]

Thanks for your suggestion.