Null traces of absolutely continuous curves #
An absolutely continuous curve in a finite-dimensional real normed space of dimension greater than one has an additive-Haar-null trace.
theorem
AbsolutelyContinuousOnInterval.addHaar_image_uIcc_eq_zero
{E : Type u_1}
[NormedAddCommGroup E]
[NormedSpace ℝ E]
[FiniteDimensional ℝ E]
[MeasurableSpace E]
[BorelSpace E]
{γ : ℝ → E}
{a b : ℝ}
(hγ : AbsolutelyContinuousOnInterval γ a b)
(μ : MeasureTheory.Measure E)
[μ.IsAddHaarMeasure]
(hd : 1 < Module.finrank ℝ E)
:
The trace of an absolutely continuous curve is additive-Haar-null in ambient dimension greater than one.