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  • 06B20  (1)
  • ADMINISTRATION AND MANAGEMENT  (1)
  • 1990-1994  (2)
  • 1930-1934
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  • 1990-1994  (2)
  • 1930-1934
Year
  • 1
    Electronic Resource
    Electronic Resource
    Generalizing semidistributivity (1993)
    Springer
    Order 10 (1993), S. 77-92 
    Details
    ISSN: 1572-9273
    Keywords: 06B05 ; 06B20 ; Doubling construction ; semidistributive lattices ; k-semidistributivity ; context ; doubling classes ; pseudovariety
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract A latticeL is called congruence normal if it can be generated by doubling of convex sets starting with the one-element lattice. In the special case of intervals, the lattice is called bounded. It has been proven thatL is bounded if and only ifL is congruence normal and semidistributive. In this paper we study the connection between certain classes of convex sets and generalized semidistributive laws. These so-called doubling classes are pseudovarieties which can be described by implications as well as by forbiden substructures. In the end, we examine the structure of the lattice of all doubling classes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01108710
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    Paper (German National Licenses)
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  • 2
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    The impact of new business approaches derived from the Manned Transportation System Study (1992)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The results are reported of a survey conducted among senior managers within the government and participating companies to identify the items that could improve industry's way of doing business with NASA. New and recommended practices in management, operations, organization, procurement, and procedures are discussed. The development of multitiered requirement systems for NASA programs is addressed.
    Keywords: ADMINISTRATION AND MANAGEMENT
    Type: AIAA PAPER 92-1706
    Format: text
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    NASA TECHNICAL REPORTS
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