Definition:Multiset/Technical Note

The $\LaTeX$ code for $\multiset {a, b, b, c}$ is \multiset {a, b, b, c} .
This command is specific to $\mathsf{Pr} \infty \mathsf{fWiki}$.
The underlying conventional $\LaTeX$ implementation to achieve this is:
\left\lbrace \! \left\lbrace {a, b, b, c} \right\rbrace \! \right\rbrace}