English
Define Haar measure by normalizing the content: multiplying the content measure by the inverse of its mass on K0.
Русский
Определим меру Хаара как нормировку содержанием: массой контента на K0 делим по обратному значению массы.
LaTeX
$$haarMeasure_K0 = ((haarContent_K0).measure_K0)^{-1} · (haarContent_K0).measure$$
Lean4
/-- The Haar measure on the locally compact group `G`, scaled so that `haarMeasure K₀ K₀ = 1`. -/
@[to_additive /-- The Haar measure on the locally compact additive group `G`, scaled so that
`addHaarMeasure K₀ K₀ = 1`. -/
]
noncomputable def haarMeasure (K₀ : PositiveCompacts G) : Measure G :=
((haarContent K₀).measure K₀)⁻¹ • (haarContent K₀).measure