rw [this]
this : (Real.sqrt π)⁻¹ = (Real.sqrt π)⁻¹ / Real.sqrt 1
h : Real.sqrt 1 ≠ 0
⊢ Tendsto centralBinomialUpper atTop (𝓝 (Real.sqrt π)⁻¹)
this : (Real.sqrt π)⁻¹ = (Real.sqrt π)⁻¹ / Real.sqrt 1
h : Real.sqrt 1 ≠ 0
⊢ Tendsto centralBinomialUpper atTop (𝓝 ((Real.sqrt π)⁻¹ / Real.sqrt 1))