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2.11. Intelsat orders an Ariane launch

Book ID
116081203
Publisher
Elsevier Science
Year
1979
Weight
70 KB
Volume
1979
Category
Article
ISSN
0045-8732

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Quasi-symmetric 2-(28, 12, 11) designs w
Quasi-symmetric 2-(28, 12, 11) designs with an automorphism of order 7
โœ Yuan Ding; Sheridan Houghten; Clement Lam; Suzan Smith; Larry Thiel; Vladimir D. ๐Ÿ“‚ Article ๐Ÿ“… 1998 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 142 KB

All quasi-symmetric 2-(28, 12, 11) designs with an automorphism of order 7 without fixed points or blocks are enumerated. Up to isomorphism, there are exactly 246 such designs. All but four of these designs are embeddable as derived designs in symmetric 2-(64, 28, 12) designs, producing in this way