Let $G$ be an abelian Lie subgroup of the projective linear group $\mathrm{PGL}(n,\mathbb C)=\mathrm {Aut} (\mathbb CP^n) $. Are the orbits of $G$ in $\mathbb CP^n$ closed? (acting by group automorphisms)
2026-03-25 05:00:02.1774414802
Abelian group action on a projective space
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