English
In the alg-closed setting, or under triangularizability, the iSup over weights in Weight(K,L,M) of genWeightSpace M χ equals top.
Русский
В условии треугольности или при алгебраически замкнутом поле берём супремум по всем весам — получаем верхний подмодуль.
LaTeX
$$$\bigvee_{\chi \in \mathrm{Weight}(K,L,M)} \mathrm{genWeightSpace}(M,\chi) = \top$$$
Lean4
theorem iSup_genWeightSpace_eq_top' [IsTriangularizable K L M] : ⨆ χ : Weight K L M, genWeightSpace M χ = ⊤ :=
by
have := iSup_genWeightSpace_eq_top K L M
erw [← iSup_ne_bot_subtype, ← (Weight.equivSetOf K L M).iSup_comp] at this
exact this