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semantic_acyclicity (358B)

      1 # Semantic acyclicity
      2 
      3 The [computational_problem] of deciding if [query] is [query_equivalent] to [query_acyclic], within a specific [query_class]
      4 - for [UC2RPQ], cf [morvan2025homomorphism] Chapter V
      5 - for [CQs], it is [NP_complete], cf [barcelo2016semantic]
      6 
      7 Up: [computational_problem], [database_theory]
      8 
      9 See also: [semantic_treewidth], [formula_width]