伊甸园和规格
Garden of Eden and Specification
摘要:
本文对具有弱规范性质的顺从群的扩张代数作用建立了伊甸园定理,即对任何从基空间到自身的连续等变映射T,T是预内射的当且仅当它是满射的.特别地,这适用于顺从群的所有扩张主代数作用和具有CPE的Z^d的扩张代数作用。
英文摘要:
We establish a Garden of Eden theorem for expansive algebraic actions of amenable groups with the weak specification property, i.e. for any continuous equivariant map T from the underlying space to itself, T is pre-injective if and only if it is surjective. In particular, this applies to all expansive principal algebraic actions of amenable groups and expansive algebraic actions of Z^d with CPE.
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