  In this article we generalize results of Clozel and Ray (for $SL_2$ and
$SL_n$ respectively) to give explicit ring-theoretic presentation in terms of a
complete set of generators and relations of the Iwasawa algebra of the pro-$p$
Iwahori subgroup of a connected, split, reductive group $\mathbb{G}$ over
$\mathbb{Q}_p$.
