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dioid (364B)


      1 # Dioid
      2 
      3 Semiring where 1 + 1 = 1
      4 - Implies [idempotence]: x + x = x
      5 - [natural_order]: x <= y si x + y = y
      6 
      7 Also called an "idempotent semiring"
      8 
      9 Freely generated dioid over a set of variables, with no coefficients: [bool_x]
     10 - infinite [omega_chain]: 1 < 1 + z < 1 + z + z^2 < ...
     11 
     12 strenghtening: [semiring_absorptive]
     13 
     14 Up: [semiring]
     15 
     16 See also: [kleene_algebra]