Almeida, Jorge; Ésik, Zoltán; Pin, Jean-Éric Commutative positive varieties of languages. (English) Zbl 1389.68055 Acta Cybern. 23, No. 1, 91-111 (2017). Summary: We study the commutative positive varieties of languages closed under various operations: shuffle, renaming and product over one-letter alphabets. Cited in 3 Documents MSC: 68Q70 Algebraic theory of languages and automata Keywords:formal languages; commutative positive varieties PDFBibTeX XMLCite \textit{J. Almeida} et al., Acta Cybern. 23, No. 1, 91--111 (2017; Zbl 1389.68055) Full Text: DOI arXiv