English
If K is strictly supported relative to e, then every f i is an isomorphism.
Русский
Если K строго поддержан относительно e, то каждый f i является изоморфизмом.
LaTeX
$$For all i, IsIso((K.restrictionToTruncGE' e).f i)$$
Lean4
@[reassoc (attr := simp)]
theorem restrictionToTruncGE'_naturality :
K.restrictionToTruncGE' e ≫ truncGE'Map φ e = restrictionMap φ e ≫ L.restrictionToTruncGE' e :=
by
ext i
by_cases hi : e.BoundaryGE i
·
simp [restrictionToTruncGE'_f_eq_iso_hom_pOpcycles_iso_inv _ e rfl hi, truncGE'Map_f_eq_opcyclesMap φ e hi rfl,
restrictionXIso]
· simp [restrictionToTruncGE'_f_eq_iso_hom_iso_inv _ e rfl hi, truncGE'Map_f_eq φ e hi rfl, restrictionXIso]