Is there any notation to take the GCD of two values in a vector? For example, if I have the following vector $$\left[\begin{eqnarray}10\\8\end{eqnarray}\right]$$ is there a function that can be applied on the entire vector that returns a single value i. e. 2?
Notation for accessing the induvidual values 10 and 8 within the vector would also be sufficient.
Note that I cannot specify any of my own functions.