Moduli of $\mathcal{G}$-bundles under nonconnected group schemes and nondensity of essentially finite bundles

Ludvig Olsson, Stefan Reppen, Tuomas Tajakka

We prove the existence of a projective good moduli space of principal $\mathcal{G}$-bundles under nonconnected reductive group schemes $\mathcal{G}$ over a smooth projective curve…