English
The infimum of the two pushforwards map inl f and map inr g is the bottom filter: they are disjoint in a precise sense.
Русский
Нижняя граница двух образов map inl f и map inr g равна нулю фильтру: они несовместимы в точном смысле.
LaTeX
$$@[simp] theorem map_inl_inf_map_inr : map inl f ⊓ map inr g = ⊥$$
Lean4
@[simp]
theorem map_inl_inf_map_inr : map inl f ⊓ map inr g = ⊥ :=
by
apply le_bot_iff.mp
trans map inl ⊤ ⊓ map inr ⊤
· apply inf_le_inf <;> simp
· simp