def
definition
def or abbrev
lensing_param
show as:
view Lean formalization →
formal statement (Lean)
32noncomputable def lensing_param (M b : ℝ) : ℝ := schwarzschild_radius M / b
proof body
Definition body.
33
34/-! ## Newtonian vs. GR Deflection -/
35
36/-- **Newtonian deflection** (treating photon as particle):
37 θ_Newton = 2GM/(c²b) = r_s / b -/