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math.DS2012★ 4 cited
Path methods for strong shift equivalence of positive matrices
Mike Boyle, K. H. Kim, F. W. Roush
In the early 1990's, Kim and Roush developed path methods for establishing strong shift equivalence (SSE) of positive matrices over a dense subring U of the real numbers R. This pa…
math.DS1999
The Williams Conjecture is false for irreducible subshifts
Ki Hang Kim, Fred W. Roush
We show the Williams Conjecture is false for irreducible shifts of finite type by examining relative sign-gyration numbers of conjugacies between shifts with no points of period on…