科研之友
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摘要
A shift space is said to be sofic if it is the factor of a shift of finite type. In one dimension, there are complete characterizations of soficness. There are no characterizations in higher dimensions, and there are few examples of non-sofic Z(d) shifts for d > 1. In this work we give a condition that implies non-soficness in higher-dimensional shift spaces, and we apply it to a variety of examples.
- 出版日期2013-11
