8 found
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  1.  33
    Nonmonotonic reasoning, preferential models and cumulative logics.Sarit Kraus, Daniel Lehmann & Menachem Magidor - 1990 - Artificial Intelligence 44 (1-2):167-207.
  2.  23
    (1 other version)What does a conditional knowledge base entail?Daniel Lehmann & Menachem Magidor - 1992 - Artificial Intelligence 55 (1):1-60.
  3.  72
    Distance semantics for belief revision.Daniel Lehmann, Menachem Magidor & Karl Schlechta - 2001 - Journal of Symbolic Logic 66 (1):295-317.
    A vast and interesting family of natural semantics for belief revision is defined. Suppose one is given a distance d between any two models. One may then define the revision of a theory K by a formula α as the theory defined by the set of all those models of α that are closest, by d, to the set of models of K. This family is characterized by a set of rationality postulates that extends the AGM postulates. The new postulates (...)
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  4.  27
    Brain electric microstates and momentary conscious mind states as building blocks of spontaneous thinking: I.Daniel Lehmann, W. K. Strik, B. Henggeler & T. Koenig - 1998 - Visual Imagery and Abstract Thoughts. International Journal of Psychophysiology 29:1-11.
  5.  10
    Rationality, transitivity, and contraposition.Michael Freund, Daniel Lehmann & Paul Morris - 1991 - Artificial Intelligence 52 (2):191-203.
  6.  78
    Nonmonotonic reasoning: From finitary relations to infinitary inference operations.Michael Freund & Daniel Lehmann - 1994 - Studia Logica 53 (2):161 - 201.
    A. Tarski [22] proposed the study of infinitary consequence operations as the central topic of mathematical logic. He considered monotonicity to be a property of all such operations. In this paper, we weaken the monotonicity requirement and consider more general operations, inference operations. These operations describe the nonmonotonic logics both humans and machines seem to be using when infering defeasible information from incomplete knowledge. We single out a number of interesting families of inference operations. This study of infinitary inference operations (...)
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  7.  20
    Nonmonotonic inference operations.Michael Freund & Daniel Lehmann - 1993 - Logic Journal of the IGPL 1 (1):23-68.
    A. Tarski [21] proposed the study of infinitary consequence operations as the central topic of mathematical logic. He considered monotonicity to be a property of all such operations. In this paper, we weaken the monotonicity requirement and consider more general operations, inference operations. These operations describe the nonmonotonic logics both humans and machines seem to be using when infering dofeasible information from incomplete knowledge. We single out a number of interesting families of inference operations. This study of infinitary inference operations (...)
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  8. Source localization of brain electric field frequency bands during conscious, spontaneous visual imagery and abstract thought.Daniel Lehmann, B. Henggler, M. Koukkan & M. Michel - 1993 - Cognitive Brain Research 1:203-20.