TITLE: Is there a symbol for "given" in mathematics?
QUESTION [8 upvotes]: Is there a symbol for "given" in mathematics? For example, for the statement:

Each member, $x$, of the integer sequence $f(n)$ equals the sum of the
  two previous members, $f(n-1)$ and $f(n-2)$, given $f(0) = 0$ and
  $f(1) = 1$.

How do you write this symbolically?

REPLY [2 votes]: You can read $$A \rightarrow B$$ as "$A$ implies $B$" and $$A \leftarrow B$$ as "$A$ if $B$" or "$A$ given $B$."
For example, the statement "$n! = 1$ given that $n=0$" can be written $$n! = 1 \leftarrow n=0.$$