科研之友
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摘要
A morphism a is unambiguous with respect to a word a if there is no other morphism tau that maps a to the same image as a. In the present paper we study the question of whether, for any given word, there exists an unambiguous 1-uniform morphism, i.e., a morphism that maps every letter in the word to an image of length 1.
- 出版日期2013-3-25
