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least_three_square_packing_in_circle

Specification

What is the smallest circle that can contain 3 unit squares? Reference: [Wikipedia](https://en.wikipedia.org/wiki/Square_packing#In_a_circle)

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Lean 4 Statement 
theorem least_three_square_packing_in_circle :
    IsLeast {r : ℝ | Nonempty (Packing 3 UnitSquare (Circle r))} answer(sorry)
ID: Wikipedia__SquarePacking__least_three_square_packing_in_circle
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