摘要
In this paper,we discuss the invariant measures for planar piecewise isometries.It is shown that the Hausdorff measure restricted to an almost invariant set with respect to the Hausdorff measure is invariant.
In this paper,we discuss the invariant measures for planar piecewise isometries.It is shown that the Hausdorff measure restricted to an almost invariant set with respect to the Hausdorff measure is invariant.
基金
Project supported by the National Natural Science Foundation of China (Grant No.10672146)
the Natural Science Foundation of Jiangxi Province (Grant No.2007GQS0142)