Some Remarks on Invariant Means.
On the Proportionality of Covolumes of Discrete Subgroups.
Invariant Analytic Hypersurfaces.
Invariant measures for actions of unipotent groups over local fields on homogeneous spaces.
Values of quadratic forms at primitive integral points.
Orbit closures of generic unipotent flows on homogeneous spaces of SL (3, IR).
Some linear groups virtually having a free quotient.
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