Formal languages
Handbook of formal languages, vol. 1: word, language, grammar
Handbook of formal languages, vol. 1: word, language, grammar
Journal of the ACM (JACM)
On an Extension of the Parikh Mapping
On an Extension of the Parikh Mapping
Theoretical Computer Science
Subword histories and Parikh matrices
Journal of Computer and System Sciences
Some characterizations of Parikh matrix equivalent binary words
Information Processing Letters
Connections between subwords and certain matrix mappings
Theoretical Computer Science - The art of theory
On the Injectivity of Parikh Matrix Mappings
Fundamenta Informaticae - Contagious Creativity - In Honor of the 80th Birthday of Professor Solomon Marcus
On the Injectivity of the Parikh Matrix Mapping
Fundamenta Informaticae
Independence of certain quantities indicating subword occurrences
Theoretical Computer Science
Subword Balance in BinaryWords, Languages and Sequences
Fundamenta Informaticae - New Frontiers in Scientific Discovery - Commemorating the Life and Work of Zdzislaw Pawlak
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We deal with the notion of M-unambiguity [5] in connection with the Parikh matrix mapping introduced by Mateescu and others in [7]. M-unambiguity is studied both in terms of words and matrices and several sufficient criteria for M-unambiguity are provided in both cases, nontrivially generalizing the criteria based on the γ-property introduced by Salomaa in [15]. Also, the notion of M-unambiguity with respect to a word is defined in connection with the extended Parikh matrix morphism [16] and some of the M-unambiguity criteria are lifted from the classical setting to the extended one. This paper is a revised and extended version of [17].