Difference between revisions of "Factorial"

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(Created page with "Let $n$ be an integer. Then the factorial of $n$, written $n!$, is the integer $$n!=n(n-1)(n-2)\ldots 3 \cdot 2 \cdot 1.$$")
 
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Let $n$ be an integer. Then the factorial of $n$, written $n!$, is the integer  
 
Let $n$ be an integer. Then the factorial of $n$, written $n!$, is the integer  
 
$$n!=n(n-1)(n-2)\ldots 3 \cdot 2 \cdot 1.$$
 
$$n!=n(n-1)(n-2)\ldots 3 \cdot 2 \cdot 1.$$
 +
The most common way to interpolate this function to allow complex inputs is via the [[gamma function]].

Revision as of 15:20, 14 October 2014

Let $n$ be an integer. Then the factorial of $n$, written $n!$, is the integer $$n!=n(n-1)(n-2)\ldots 3 \cdot 2 \cdot 1.$$ The most common way to interpolate this function to allow complex inputs is via the gamma function.