On Radon Measures Invariant Under Horospherical Flows on Geometrically Infinite Quotients
On Radon Measures Invariant Under Horospherical Flows on Geometrically Infinite Quotients
复制标题
几何无限商上的星球流下氡测度不变
DOI:
10.1093/imrn/rnab024
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
E. Lindenstrauss
中科院分区:
文献类型:
--
作者:
Or Landesberg;E. Lindenstrauss
We consider a locally finite (Radon) measure on $ SO^+(d,1)/ \Gamma $ invariant under a horospherical subgroup of $ SO^+(d,1) $ where $ \Gamma $ is a discrete, but not necessarily geometrically finite, subgroup. We show that whenever the measure does not observe any additional invariance properties then it must be supported on a set of points with geometrically degenerate trajectories under the corresponding contracting $ 1 $-parameter diagonalizable flow (geodesic flow).