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A four-point criterion for the Möbius property of a homeomorphism of plane domains

✍ Scribed by V. V. Aseev; T. A. Kergilova

Book ID
110187523
Publisher
SP MAIK Nauka/Interperiodica
Year
2011
Tongue
English
Weight
234 KB
Volume
52
Category
Article
ISSN
0037-4466

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✍ Agnes Hui Chan 📂 Article 📅 1981 🏛 Elsevier Science 🌐 English ⚖ 462 KB

Let % be a class of subsets of a finite set X. Elements of $!I are called blocks. Let u, t, A and k be nonnegative integers such thar u B k 3 t 3 0. A pair (X, '%?l) is called a (u, k, A) t-design, denoted by S,(t, k, u), if (1) 1x1 = u, (2) every t-subset of X is contained in exactly A blocks and (