Irreducibility, Homoclinic Points and Adjoint Actions of Algebraic ℤ d -Actions of Rank One
Irreducibility, Homoclinic Points and Adjoint Actions of Algebraic ℤ d -Actions of Rank One
复制标题
代数 ℤ d - 一阶动作的不可约性、同宿点和伴随动作
DOI:
10.1007/978-94-010-0345-2_4
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发表时间:
2002
期刊:
影响因子:
--
通讯作者:
K. Schmidt
中科院分区:
文献类型:
--
作者:
M. Einsiedler;K. Schmidt
In this paper we consider Zd-actions, d~ 1, byautomorphisms of compact connected abelian groups which contain at least one expansive automorphism (such actions are called algebraic Zd-actions of expansive rank one). If a is such a Zd-action on an infinite compact connected abelian group X, then every expansive element an of this action has a dense group b. nn (X) of homo clinic points. For different expansive elements am, an these groups are generally different and may have zero intersection. By obtaining an appropriate structure formula we prove that these groups are canonically isomorphic for different m, n, and that the restriction of a to any of these groups defines by duality another algebraic Zd-action a* of expansive rank one on a compact connected abelian group X*, called the adjoint action of a. The second adjoint a**=(a*)* obtained by repeating this construction is algebraically conjugate to a.A class of examples of algebraic Zd-actions of expansive rank one is obtained by fixing ad-tuple c of algebraic numbers consisting not entirely of roots of unity and by associating with it a finite set Se of places of the algebraic number field K= K (c) generated by the entries of c. For every Be-integral ideal J in K we define an algebraic Zd-action a of expansive rank