Grade 6 Mathematics Set Complement. In our example above the complement of -2 -1 0 1 is the set containing all the integers that do not. If U is the universe that contains all the elements under study and there is no need to mention it because it is obvious and unique then the absolute complement of A is the relative complement of A in U.
The tilde in the set-relation context says that I now want to find the complement in a sense the opposite of whatever is being negated or thrown out.
The complement of set A is denoted by A You can also say complement of A in or A-prime. In our example above the complement of -2 -1 0 1 is the set containing all the integers that do not. In the example H T c f Hbackslash T c f H T cf. A A.