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homomorphism_closed (262B)

      1 # Homomorphism closed
      2 
      3 [query] Q closed under [homomorphism]:
      4   - if A satisfies Q and A has [homomorphism] to B then B also satisfies Q
      5 
      6 [cate2023when]: characterization of which classes are closed under [homomorphism_count]
      7 
      8 Up: [closure] under [homomorphism]