منابع مشابه
Finite Group Extensions of Shifts of Finite Type: K-theory, Parry and Livšic
This paper extends and applies algebraic invariants and constructions for mixing finite group extensions of shifts of finite type. For a finite abelian group G, Parry showed how to define a G-extension SA from a square matrix over Z+G, and classified the extensions up to topological conjugacy by the strong shift equivalence class of A over Z+G. Parry asked in this case if the dynamical zeta fun...
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Gentle and Todorov proved that in an abelian category with enough projective objects, the extension subcategory of two covariantly finite subcategories is covariantly finite. We give an example to show that Gentle–Todorov’s theorem may fail in an arbitrary abelian category; however we prove a triangulated version of Gentle–Todorov’s theorem which holds for arbitrary triangulated categories; we ...
متن کاملEventual Extensions of Finite Codes
Suppose S and T are shift equivalent mixing shifts of finite type, and / is a conjugacy from a subsystem of S to a subsystem of T. Then for any sufficiently large n, f extends to a conjugacy of Sn and Tn. A consequence of the proof is a fortified version of Wagoner's Stable FOG Theorem. Recall [Wi] that a nonnegative integral matrix A is the adjacency matrix of a directed graph whose arc set is...
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ژورنال
عنوان ژورنال: Pacific Journal of Mathematics
سال: 1978
ISSN: 0030-8730,0030-8730
DOI: 10.2140/pjm.1978.78.161