The simple 7-(33, 8, 10)-designs with automorphism group P-Gamma-L(2, 23).
Wassermann, Alfred (1995)
Séminaire Lotharingien de Combinatoire [electronic only]
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Wassermann, Alfred (1995)
Séminaire Lotharingien de Combinatoire [electronic only]
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Landjev, Ivan, Topalova, Svetlana (1998)
Serdica Mathematical Journal
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∗ This work has been partially supported by the Bulgarian NSF under Contract No. I-506/1995. In this note we construct five new symmetric 2-(61,16,4) designs invariant under the dihedral group of order 10. As a by-product we obtain 25 new residual 2-(45,12,4) designs. The automorphism groups of all new designs are computed.
William M. Kantor (1969)
Mathematische Zeitschrift
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Walter Feit (1970)
Mathematische Zeitschrift
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Araya, Makoto, Harada, Masaaki (2010)
The Electronic Journal of Combinatorics [electronic only]
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Richard Byrd, Justin Lloyd, Franklin Pederson, James Stepp (1984)
Fundamenta Mathematicae
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Crnković, Dean (2008)
Applied Mathematics E-Notes [electronic only]
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Marek Karaś (2011)
Bulletin of the Polish Academy of Sciences. Mathematics
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Let d₃ ≥ p₂ > p₁ ≥ 3 be integers such that p₁,p₂ are prime numbers. We show that the sequence (p₁,p₂,d₃) is the multidegree of some tame automorphism of ℂ³ if and only if d₃ ∈ p₁ℕ + p₂ℕ, i.e. if and only if d₃ is a linear combination of p₁ and p₂ with coefficients in ℕ.
Akiyama, Kenzi, Ogawa, Masayuki, Suetake, Chihiro (2009)
The Electronic Journal of Combinatorics [electronic only]
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Zhelezova, Stela (2011)
Serdica Journal of Computing
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This article presents the principal results of the Ph.D. thesis Investigation and classification of doubly resolvable designs by Stela Zhelezova (Institute of Mathematics and Informatics, BAS), successfully defended at the Specialized Academic Council for Informatics and Mathematical Modeling on 22 February 2010. The resolvability of combinatorial designs is intensively investigated because of its applications. This research focuses on resolvable designs with an additional...
Federico Menegazzo (1993)
Rendiconti del Seminario Matematico della Università di Padova
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Federico Menegazzo, Derek J. S. Robinson (1987)
Rendiconti del Seminario Matematico della Università di Padova
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