English
For any g in group H commuting with G, the interior transforms under the action: fundamentalInterior(G, g·s) = g·fundamentalInterior(G,s).
Русский
При действии g из группы H, коммутирующей с G, внутренняя часть трансформируется аналогично: fundamentalInterior(G, g·s) = g·fundamentalInterior(G,s).
LaTeX
$$$\\mathrm{fundamentalInterior}(G, g \\cdot s) = g \\cdot \\mathrm{fundamentalInterior}(G,s)$$$
Lean4
@[to_additive (attr := simp) MeasureTheory.addFundamentalInterior_vadd]
theorem fundamentalInterior_smul [Group H] [MulAction H α] [SMulCommClass H G α] (g : H) :
fundamentalInterior G (g • s) = g • fundamentalInterior G s := by
simp_rw [fundamentalInterior, smul_set_sdiff, smul_set_iUnion, smul_comm g (_ : G) (_ : Set α)]