Abstract
We discuss the implications of superrigidity and Ratner’s theorem on invariant measures on homogeneous spaces for understanding the fundamental group of manifolds with an action of a semisimple Lie group.
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Research partially supported by the National Science Foundation and the Israel-U.S. Binational Science Foundation.
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Zimmer, R.J. Superrigidity, ratner’s theorem, and fundamental groups. Israel J. Math. 74, 199–207 (1991). https://doi.org/10.1007/BF02775786
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DOI: https://doi.org/10.1007/BF02775786