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The $SL(n,\mathbb R)/SL(m,\mathbb R)$ cocompact-discontinuous-group conjecture
Kobayashi's special-case conjecture. This homogeneous space does not admit a cocompact discontinuous group. This is presented as a special case of the compact-standard-quotient con…
Conjecturesolveddiscontinuous-groups homogeneous-spaces proper-actionsarXiv posted 2 days ago

The SL(n,R)/SL(m,R)SL(n,\mathbb R)/SL(m,\mathbb R)SL(n,R)/SL(m,R) cocompact-discontinuous-group conjecture