Functions that act as identity function for their own return values.
@emareaf eg let X be a subset of the real numbers s.t. X = -X, then define f:
f(x) = -x if x is in X
f(x) = x if x is not in X
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
@emareaf eg let X be a subset of the real numbers s.t. X = -X, then define f:
f(x) = -x if x is in X
f(x) = x if x is not in X