boundary_operation (220B)
1 # Boundary operation 2 3 the *boundary* of a [language] L is L^* cap (L^c)^* 4 5 studied, e.g., in [jirasek2026boundary] 6 7 Up: [formal_language_operator] 8 9 See also: [kleene_star], [language_complement], [language_intersection]