Tagged Questions
0
votes
0answers
136 views
Semi-Factorial Skipping Every $k^\text{th}$ Number
For an integer $n$, the semi-factorial $n!!$ can be defined as
$$
n!! = n(n-2)(n-4)\cdots
$$
In other words, the semi-factorial of $n$ is the familiar factorial, but with every other term omitted. For ...
1
vote
0answers
61 views
Is there a standard name or shorthand for “plustorial”? [duplicate]
Possible Duplicate:
What is the term for a factorial type operation, but with summation instead of products?
We're all familiar with factorial:
$$n>0,\quad n! = n \times (n-1) \times ...
2
votes
1answer
147 views
How do I describe the growth of something that scales by a factorial?
I just wrote a blog post and wasn't sure how to word a particular sentence. Say I have the following function:
\begin{equation}
f(x) = x^2
\end{equation}
Then I can say that the value of f(x) grows ...
