Just like Sigma Notation
, except that you multiply each term times the rest instead of adding.
To be more technical, it is typically shown as something like:
| | k
k = 1
...which would resolve to something like n!
. This gets used just as much in number theory
as Sigma Notation
, and for simplicity's sake, I'm going to denote it in all my future write-ups as Π(condition
). The above example would be Π(1<=k<=n; k). You also might see something more exciting, like Π(m is a natural number and pm
is prime; (pm
). This is the prime factorization
of a natural number