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def definition def or abbrev

delta

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formal statement (Lean)

  20def delta {n : ℕ} (i j : Fin n) : ℝ :=

proof body

Definition body.

  21  if i = j then 1 else 0
  22
  23/-- The flat affine connection in `x`-coordinates. -/

used by (29)

From the project-wide theorem graph. These declarations reference this one in their body.