Conclusion
M. Freedman and R. Skora proved that the groups they constructed in [2, 3] have extensions toS 4, and that these extensions are conjugate with Schottky groups in the homeomorphism group ofS 4.
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Translated fromSibirskiî Matematicheskiî Zhurnal, Vol. 37, No. 1, pp. 90–107, January–February, 1996.
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Gusevskiî, N.A. Exotic actions of free kleinian groups. Sib Math J 37, 79–93 (1996). https://doi.org/10.1007/BF02104761
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DOI: https://doi.org/10.1007/BF02104761