Abstract
Core of a binary word, recently introduced, is a refined way to characterize binary words having the same Parikh matrices, as well as bridging the connection between binary words and partitions of natural numbers. This paper continues the work by generalizing to higher alphabet. The core of a word as well as the relatived version is the essential part of a word that captures the key information of the word from the perspective of its Parikh matrix. Various nice properties of the cores and some interesting results regarding the M-equivalence classes of ternary words are obtained.
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