Hasse norm principle for $M_{11}$ and $J_1$ extensions

Abstract

We give a necessary and sufficient condition for the Hasse norm principle for field extensions $K/k$ when the Galois groups $\mathrm{Gal}(L/k)$ of the Galois closure $L/k$ of $K/k$ are isomorphic to the Mathieu group $M_{11}$ of degree $11$ of order $7920$ or the Janko group $J_1$ of order $175560$ by determining $H^1(k,\mathrm{Pic}\overline{X})=0$ or $\mathbb{Z}/2\mathbb{Z}$ for norm one tori $T=R_{K/k}^{(1)}({\mathbb{G}}_m)$ with a smooth $k$-compactification $X$ and $\overline{X}=X{\times }_k\overline{k}$. The result gives a first step towards understanding the all pictures of the Hasse norm principle for the $26$ sporadic simple groups.

18 pages, added Norm1ToriHNP for GAP 4 ver.2024.04.03 to references which is available from KURENAI (Kyoto University Research Information Repository) http://hdl.handle.net/2433/289563