具拟不变测度群胚流上的交叉积

The Crossed Products on the Flow of Groupoid with Quasi-Invariant Measures

设G为第二可数局部紧有Haar系{λu}的群胚，A为G上左不变作用的交换群，则我们有C-动力系统（C（G），A，β）．本文我们研究具有一定性质的拟不变测度，用此测度，得到了一些有关群胚C-代数及交叉积的重要结果，

Let G be a second countale groupoid with Haar system {λu}, A be an abeliangroup which left invariant acts on G, then we have a C*-dynamic system (C*(G), A, β).In this paper we have studied the existence of quasi-invariant measure with certainproperties, using these measures some important results about crossed products andgroupoid C*-algebras have been obtained.