English
An iSupIndep family t: ι → α is characterized by disjointness of each t i with the supremum of all others.
Русский
Семейство iSupIndep определяется тем, что для каждого i множествo t i дисjoint от supremum остальных.
LaTeX
$$iSupIndep t ↔ ∀ i, Disjoint (t i) (sSup (t '' {j | j ≠ i}))$$
Lean4
theorem iSupIndep_def' : iSupIndep t ↔ ∀ i, Disjoint (t i) (sSup (t '' {j | j ≠ i})) :=
by
simp_rw [sSup_image]
rfl