`BookProof.DirectSumEdge.norm_sq_dsCore_eq_sum` (x : dsCore D) : ‖(x : lp G 2)‖ ^ 2 = ∑ i ∈ supportFinset x, ‖((x : lp G 2) : ∀ i, G i) i‖ ^ 2

Initializing...

`BookProof.DirectSumEdge.norm_sq_dsCore_eq_sum` (x : dsCore D) : ‖(x : lp G 2)‖ ^ 2 = ∑ i ∈ supportFinset x, ‖((x : lp G 2) : ∀ i, G i) i‖ ^ 2 · Prove2Me