/sci/ - Science & Math

>>14871415
Yeah because it's incorrect and doesn't make any sense.
The least ambiguous notation I know of is, where [math]V[/math] is a vector space over [math]F[/math], fixing a basis [math]\vec{e}_1, \vec{e}_2, \ldots, \vec{e}_n \in V[/math] and defining the functions functions [math]P_i : V \to F[/math] such that [math]\vec{v} = \sum_{i = 1}^n e_i P_i(\vec{v})[/math], so [math]P_i[/math] acts on a vector to return the i-th coordinate.