Regular articles

• A tourist guide through treewidth

  H. L. Bodlaender

  1-21

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• A lower bound for on-line vector-packing algorithms

  Gábor Galambos, Hans Kellerer, Gerhard J. Woeginger

  23-34

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• Some problems concerning Armstrong relations of dual schemes and relation schemes in the relational datamodel

  János Demetrovics, Vu Duc Thi

  35-47

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• Fundamental concepts of object oriented databases

  Klaus-Dieter Schewe, Bernhard Thalheim

  49-83

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• On the characterization of the integers : the hidden function problem revisited

  Rudolf Berghammer

  85-96

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• On codes concerning bi-infinite words

  Do Long Van, Huong Lam Nguyen, Phan Trung Huy

  97-109

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• Market oriented integration of MS-Windows-based tools for distributed decision support

  M. Biró, Pál Danyi, P. Gelléri

  111-119

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