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language_directed (435B)

      1 # Directed language
      2 
      3 [formal_language] where for any two words u, v of the language, there is w in the language such that u and v are both [subwords] of w
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      5 - makes it easier to check if two languages have the same [downwards_closure]
      6 - makes it easier to check [language_equivalence]
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      8 the [downward_closure] of a directed language is a single [language_ideal]
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     10 Up: [ganardi2024directed]
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     12 Aliases: directed language, directed languages