English
As above, with p interpreted as a tangent bundle point in the given sets.
Русский
Как выше, при точке p как элемент касательного пространства в заданных множествах.
LaTeX
$$$\text{tangentMapWithin } I I'' (g \circ f) s p = \text{tangentMapWithin } I' I'' g u (\text{tangentMapWithin } I I' f s p).$$$
Lean4
theorem tangentMap_comp (hg : MDifferentiable I' I'' g) (hf : MDifferentiable I I' f) :
tangentMap I I'' (g ∘ f) = tangentMap I' I'' g ∘ tangentMap I I' f := by ext p : 1;
exact tangentMap_comp_at _ (hg _) (hf _)