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`BookProof.DirectSumEdge.dsOp_edge_of_fibre_edges` (H : ∀ i, D i →ₗ[ℂ] G i) (nu : ℝ) (hedge : ∀ i (u : D i), nu * ‖(u : G i)‖ ^ 2 ≤ quadForm (H i) u) (x : dsCore D) : nu * ‖(x : lp · Prove2Me