English
From a partial family of bijections on t, restricting to a smaller set s ⊆ t yields a partial family on s, induced by restriction of each component.
Русский
Из частичного семейства биекций на множесте t получить частичное семейство на меньшем множестве s ⊆ t путем ограничения каждого компонента.
LaTeX
$$$\\text{restrict} : \\mathrm{PEquivOn}(f, \\text{equivSucc}, t) \\to \\mathrm{PEquivOn}(f, \\text{equivSucc}, s)$$$
Lean4
/-- Restrict a partial family of bijections to a smaller set. -/
@[simps]
def restrict (e : PEquivOn f equivSucc t) (h : s ⊆ t) : PEquivOn f equivSucc s
where
equiv i := e.equiv ⟨i, h i.2⟩
nat _ _ _ _ := e.nat _ _
compat _ := e.compat _