`BookProof.ChapterFreeFieldBorn.bornMap_sum_of_mem_sphere` {x : EuclideanSpace ℝ (Fin n)} (hx : x ∈ Metric.sphere (0 : EuclideanSpace ℝ (Fin n)) 1) : ∑ k, bornMap x k = 1

Initializing...

`BookProof.ChapterFreeFieldBorn.bornMap_sum_of_mem_sphere` {x : EuclideanSpace ℝ (Fin n)} (hx : x ∈ Metric.sphere (0 : EuclideanSpace ℝ (Fin n)) 1) : ∑ k, bornMap x k = 1 · Prove2Me