A pragmatic way out of the maze of uncertainty measures

  • Giuseppe Longo
  • Andrea Sgarro
7. Hybrid Approaches To Uncertainty
Part of the Lecture Notes in Computer Science book series (LNCS, volume 521)


We argue that the construction of a general (non-specific) theory of pragmatic uncertainty measures is a dubious undertaking. To make our point we discuss fractional entropy, a measure introduced in the specific context of cryptography. Two new properties of fractional entropy are proved.


entropy conditional entropy uncertainty measures 


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Copyright information

© Springer-Verlag Berlin Heidelberg 1991

Authors and Affiliations

  • Giuseppe Longo
    • 1
  • Andrea Sgarro
    • 2
    • 3
  1. 1.DEEIUniversity of TriesteTriesteItaly
  2. 2.Department of Mathematics and Computer ScienceUniversity of UdineUdineItaly
  3. 3.Department of Mathematical SciencesUniversity of TriesteTriesteItaly

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