I am taking this Evolutionary Computation class as a part of my college degree. I see a lot of "Trap", "Trap-1", "Trap-3" during the lectures. My professor is not doing a great job explaining things. Can someone explain me what does the number represent in "Trap-1", "Trap-2 or "Trap-5"? I mean 1,3,and 5 trap functions. Please let me know if you do not understand my question.