def
definition
def or abbrev
frobeniusAngle
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formal statement (Lean)
40def frobeniusAngle (q : ℕ) (a : ℤ) : ℝ :=
proof body
Definition body.
41 Real.arccos ((a : ℝ) / (2 * Real.sqrt (q : ℝ)))
42
43/-- The Hasse--Weil bound: `a^2 ≤ 4 q`, equivalently `|a| ≤ 2 √q`. -/