𝔖 Bobbio Scriptorium
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COUNTING NUMERICAL SEMIGROUPS WITH SHORT GENERATING FUNCTIONS

✍ Scribed by BLANCO, VÍCTOR; GARCÍA-SÁNCHEZ, PEDRO A.; PUERTO, JUSTO

Book ID
111917753
Publisher
World Scientific Publishing Company
Year
2011
Tongue
English
Weight
39 KB
Volume
21
Category
Article
ISSN
0218-1967

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✍ Inessa Levi; Steve Seif 📂 Article 📅 2003 🏛 Elsevier Science 🌐 English ⚖ 173 KB

Let τ be a partition of the positive integer n. A partition of the set X n = {1, 2, . . . , n} is said to be of type τ if the sizes of its classes form the partition τ of n. Given 1 < r < n, an r element subset A of X n and a partition π of X n are said to be orthogonal if every class of π meets A i