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𝔽˘ 𝕩, 𝕨 𝔽˘ 𝕩: Cells

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Apply 𝔽 to/between the major cells of the arguments. (𝔽⎉¯1)

↗️
    a ← 3‿3 ⥊ ↕9


    <˘ a
⟨ ⟨ 0 1 2 ⟩ ⟨ 3 4 5 ⟩ ⟨ 6 7 8 ⟩ ⟩

    a ≍˘ a
┌─       
╎ 0 1 2  
  0 1 2  
         
  3 4 5  
  3 4 5  
         
  6 7 8  
  6 7 8  
        ┘