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homomorphism_equivalence (423B)

      1 # Homomorphism equivalence
      2 
      3 A and B are *homomorphically equivalent* if there is a [homomorphism] from A to B and a [homomorphism] from B to A
      4 
      5 It is an [equivalence_relation]:
      6 - [transitivity] is because the [composition] of two [homomorphisms] is a [homomorphism]
      7 
      8 Up: [homomorphism], [equivalence]
      9 
     10 See also: [minimization_conjunctive_query], [bisimulation]
     11 
     12 Aliases: homomorphic equivalence, homomorphically equivalent