Is there any convention about the notation to use for clusters of $2-$D data points?
I have a set of clusters of $2-$D data point. I can denote each cluster with $c_i$, where $i = 1, 2, ..., n$, and $n$ is the total number of clusters.
All the clusters lie at different distances from a certain point $p$, and I know all the distances from each cluster center to that point $p$, i.e. $d_1, d_2, d_3, etc..$.
Also, I know an approximate area for each cluster, that I can denote with $A_1, A_2, ...$
I would like to write down the area of the closest cluster to the point $p$, but I am not sure about the way to do it, according to potential conventions.
Could you please tell me if my attempt might be aligned to possible conventions on the notiation?
\begin{equation} A_{min(d)} \end{equation}
or
\begin{equation} \left.A_i\right|_{min(d)} \end{equation}