English
For a HasLimit F, with cone c, the equation limit.w expresses that the universal cone morphism w from the limit cone to c commutes with the projections π_j, i.e. the standard w relation between a limit and any cone.
Русский
Для HasLimit F выражение limit.w describes порядок, по которому универсальный морфизм между пределом и конусом коммутиует с проекциями π_j.
LaTeX
$$$ limit.cone w?\\;\\text{(F)} : w$$$
Lean4
/-- The projection from the limit object to a value of the functor. -/
def π (F : J ⥤ C) [HasLimit F] (j : J) : limit F ⟶ F.obj j :=
(limit.cone F).π.app j