May 31, 2005

• Subject and Predicates

  “A Chu space is a set X of subjects
  and a set A of predicates on those subjects. These stand in a
  symbiotic relationship in which the nature of each is determined by the
  other. Each subject is characterized by the values the predicates take
  on it, while each predicate is characterized by its values on
  subjects.”

  – Vaughan Pratt, Chu Spaces

  

  Click here for Sambin’s paper (ps).

  It would seem that Pratt and Sambin need to reconcile their similar predicates for the same subject.

  For some background on Sambin’s approach to the subject, see

  Mathematical Modal Logic:
  A View of its Evolution (pdf),
  by Robert Goldblatt at
  Victoria University of Wellington’s
  Centre for Logic, Language,
  and Computation

  For some background on Pratt’s approach to the subject, see

  Information Transfer
  Across Chu Spaces (pdf),
  by Johan van Benthem
  at the University of Amsterdam’s
  Institute for Logic, Language,
  and Computation

  For a gloss on Sambin’s words
  
  see the Log24 entry of Epiphany, 2005.

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