Geodesic
Cohomology groups, multipliers and factors in ergodic theory
Studia Mathematica, Tome 122 (1997) no. 3, pp. 275-288 Cet article a éte moissonné depuis la source Institute of Mathematics Polish Academy of Sciences

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The problem of compact factors in ergodic theory and its relationship with the problem of extending a cocycle to a cocycle of a larger action are studied. 
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     title = {Cohomology groups, multipliers and factors in ergodic theory},
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M. Lemańczyk. Cohomology groups, multipliers and factors in ergodic theory. Studia Mathematica, Tome 122 (1997) no. 3, pp. 275-288. doi: 10.4064/sm-122-3-275-288

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