English
The equality of the functorial representation of mulRight with the concrete function y ↦ yx holds by definitional equality.
Русский
Сопоставление между представлением mulRight и явной функцией y ↦ yx следует из определения.
LaTeX
$$$\\mathrm{Eq}\\,(\\text{ContinuousMap.mulRight } x)\\;\\; =\\;\\; (\\lambda y. y x)$$$
Lean4
@[to_additive]
theorem smul (hf : ContinuousWithinAt f s b) (hg : ContinuousWithinAt g s b) :
ContinuousWithinAt (fun x => f x • g x) s b :=
Filter.Tendsto.smul hf hg