How to construct a triple $(\overline{G},G,\mu)$ for an infinite-dimensional group $G$?

How to construct a triple $(\overline{G}, G, μ)$ for an infinite-dimensional group $G$ ?

$How to construct a triple $(\overline{G},G,\mu)$ for an infinite-dimensional group $G$? cover$

A subscription is required to access this book chapter.