Discrete Mathematics, Volume 238

Volume 238, Number 1-3, July 2001

• Charles J. Colbourn, Hao Shen:
  Preface. 1-
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• Ahmed M. Assaf, Nabil Shalaby, Jianxing Yin:
  Directed packing and covering designs with block size four. 3-17
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• Marco Buratti, Fulvio Zuanni:
  Some observations on three classical BIBD constructions. 19-26
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• Wende Chen, Torleiv Kløve:
  Weight hierarchies of binary linear codes of dimension 4. 27-34
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• Jörg Eisfeld, Leo Storme, Tamás Szonyi, Péter Sziklai:
  Covers and blocking sets of classical generalized quadrangles. 35-51
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• Suogang Gao, Hong You:
  Vanishing conditions on parameters for P(Q)-polynomial association schemes. 53-60
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• Dieter Held, Mario-Osvin Pavcevic:
  Some new Hadamard designs with 79 points admitting automorphisms of order 13 and 19. 61-65
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• Tor Helleseth, Chunming Rong, Kyeongcheol Yang:
  On t-designs from codes over Z₄. 67-80
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• Torleiv Kløve:
  Relations between the covering and Newton radii of binary codes. 81-88
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• Jianguo Lei, Qingde Kang, Yanxun Chang:
  The spectrum for large set of disjoint incomplete Latin squares. 89-98
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• Tatsuya Maruta:
  The nonexistence of some quaternary linear codes of dimension 5. 99-113
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• Antonio Pasini:
  Four-dimensional football, fullerenes and diagram geometry. 115-130
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• Alan R. Prince:
  Covering sets of spreads in PG(3, q). 131-136
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• Dian-hua Wu, Lie Zhu:
  Bounds and constructions for TWOOAs. 137-145
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• Shengyuan Zhang, Shitang Li:
  Some new extremal self-dual codes with lengths 42, 44, 52, and 58. 147-150
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• Yingshan Zhang, Shanqi Pang, Yunpeng Wang:
  Orthogonal arrays obtained by generalized Hadamard product. 151-170
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• Zhaozhi Zhang, Xiaomin Ma, Yixian Yang:
  A unified method to construct neural network decoders for arbitrary codes and decoding rules. 171-181
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• Lie Zhu, Hantao Zhang:
  A few more r-orthogonal latin squares. 183-191
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