def definition def or abbrev

`straight_line`

No prose has been written for this declaration yet. The Lean source and graph data below render without it.

formal statement (Lean)

  42@[simp] def straight_line (ic : InitialConditions) : ℝ → (Fin 4 → ℝ) :=

Definition body.

  43  fun lam μ => ic.position μ + lam * ic.direction μ
  44
  45/-- Straight coordinate line in Minkowski coordinates. -/

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

minkowski_straight_line_is_geodesic in IndisputableMonolith.Relativity.Geodesics.NullGeodesic decl_use
null_geodesic_exists_minkowski in IndisputableMonolith.Relativity.Geodesics.NullGeodesic decl_use
straight_null_geodesic in IndisputableMonolith.Relativity.Geodesics.NullGeodesic decl_use

Lean names referenced from this declaration's body.

InitialConditions in IndisputableMonolith.Relativity.Geodesics.NullGeodesic decl_use