An Dynkin diagram
= An Dynkin diagram
{c}
{title2=$A_n$}
For $n\ge1$, the finite <Dynkin diagram> $A_n$ is a chain of $n$ vertices joined by single bonds. It represents the <root system> of $\mathfrak{sl}_{n+1}$.
= An Dynkin diagram
{c}
{title2=$A_n$}
For $n\ge1$, the finite <Dynkin diagram> $A_n$ is a chain of $n$ vertices joined by single bonds. It represents the <root system> of $\mathfrak{sl}_{n+1}$.