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1. CJM 2000 (vol 52 pp. 332)
| Multiple Mixing and Rank One Group Actions Suppose $G$ is a countable, Abelian group with an element of
infinite order and let ${\cal X}$ be a mixing rank one action of
$G$ on a probability space. Suppose further that the F\o lner
sequence $\{F_n\}$ indexing the towers of ${\cal X}$ satisfies a
``bounded intersection property'': there is a constant $p$ such
that each $\{F_n\}$ can intersect no more than $p$ disjoint
translates of $\{F_n\}$. Then ${\cal X}$ is mixing of all orders.
When $G={\bf Z}$, this extends the results of Kalikow and Ryzhikov
to a large class of ``funny'' rank one transformations. We follow
Ryzhikov's joining technique in our proof: the main theorem follows
from showing that any pairwise independent joining of $k$ copies of
${\cal X}$ is necessarily product measure. This method generalizes
Ryzhikov's technique.
Category:28D15 |

