expansiveness;
algebraic action;
integral domain;
valuation;
D O I:
10.1007/s00605-005-0338-8
中图分类号:
O1 [数学];
学科分类号:
0701 ;
070101 ;
摘要:
This paper gives an algebraic characterization of expansive actions of countable abelian groups on compact abelian groups. This naturally extends the classification of expansive algebraic Z(d)-actions given by Schmidt using complex varieties. Also included is an application to a natural class of examples arising from unit subgroups of integral domains.