The process of taking the complement of a set or truth function. In the latter case, complementation is equivalent to the NOT operation.

# Complementation

## See also

Complement, NOT## Explore with Wolfram|Alpha

## Cite this as:

Weisstein, Eric W. "Complementation."
From *MathWorld*--A Wolfram Web Resource. https://mathworld.wolfram.com/Complementation.html