English
A property for germs at a point in a charted space is equivalent to the corresponding germ condition in a chart.
Русский
Свойство для локальных образований в точке в диаграммном пространстве эквивалентно соответствующему условию в карте.
LaTeX
$$$ChartedSpace.LiftPropAt P f x \Leftrightarrow (\text{condition in chart})$$$
Lean4
/-- Given a property of germs of functions and sets in the model space, then one defines
a corresponding property of a function at a point in a charted space, by requiring that it holds
in the preferred chart. -/
def LiftPropAt (P : (H → H') → Set H → H → Prop) (f : M → M') (x : M) :=
LiftPropWithinAt P f univ x