Klement, E. P.; Mesiar, R.; Pap, E. Triangular norms as ordinal sums of semigroups in the sense of A. H. Clifford. (English) Zbl 1007.20054 Semigroup Forum 65, No. 1, 71-82 (2002). From the authors’ abstract: Ordinal sums of semigroups leading to triangular norms are studied, generalizing the ordinal sum of triangular norms. The summands of these general ordinal sums are fully characterized, and the ordinal irreducibility of triangular norms is investigated, inducing a natural partition of the class of all triangular norms. Reviewer: John A.Hildebrant (Baton Rouge) Cited in 65 Documents MSC: 20M05 Free semigroups, generators and relations, word problems 03E72 Theory of fuzzy sets, etc. Keywords:triangular norms; ordinal sums; semigroups; ordinal irreducibility PDF BibTeX XML Cite \textit{E. P. Klement} et al., Semigroup Forum 65, No. 1, 71--82 (2002; Zbl 1007.20054) Full Text: DOI