Category:Definitions/Factorials

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This category contains definitions related to Factorials.
Related results can be found in Category:Factorials.


The factorial of $n$ is defined as:

\(\displaystyle n!\) \(=\) \(\displaystyle \prod_{k \mathop = 1}^n k\)
\(\displaystyle \) \(=\) \(\displaystyle 1 \times 2 \times \cdots \times \paren {n - 1} \times n\)

where $\displaystyle \prod$ denotes product notation.