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By Ageev A.A.

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In a limited set of experiments, the semantic distance between the compressed and the full form of the history was found relatively small! 1 Prehistory The word ' h i s t o g r a m ' is of Greek origin, as it is a composite of the words 'isto-s' (~aTOS) (= 'mast', also means 'web' but this is not relevant to this discussion) and 'gram-ma' (Tpc~#pc~) (= 'something written'). , long shapes vertically standing, or something similar. It is not, however, a Permission to copy without fee all or part of this material is granted provided that the copies are not made or distributed for direct commercial advantage, the VLDB copyright notice and the title of the publication and its date appear, and notice is given that copying is by permission of the Very Large Data Base Endowment.

Let ]2i = { v~(k): 1 _< k _< Di }, where vi(k) < v~(j) when k < j. The spread s~(k) of v~(k) is defined as si(k) = v i ( k + 1 ) - v ~ ( k ) , for 1 _< k < D~. ) The frequency f~(k) of vi(k) is the number of tuples in R with Xi = vi(k). The area a~(k) of v~(k) is defined as a~(k) = f~(k) • s~(k). , (v~(D~), f~(D~)) }.

Kulkami, Peter M. Schwarz: SQL MED- a Status report.. SIGMOD Record 31(3), (2001) [MS01 ] Morgan Stanley CIO Survey, May 2001. htm. [RB01 ]E. Rahm, P. Bemstein: A Survey of Approaches to Automatic Schema Matching, VLDB Journal 10 (4), pp. 334-350, 2001. [SCK02]A. Somani, D. Choy, and J. C. Kleewein, "Bringing Together Content and Data Management Systems: Challenges and Opportunities," [IBM02], 686696 (2002). P. A. Larson: Federated Database Systems for Managing Distributed, Heterogeneous, and Autonomous Databases, ACM Computing Surveys 22 (3), pp.

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A 3/2-approximation algorithm for the jump number of interval orders by Ageev A.A.

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