Le texto fonte de Projection (algebra linear)

{{infobox/articulo}}
In [[algebra linear]] e [[analyse functional]], un '''projection''' es un [[transformation linear]] ''P'' de un [[spatio de vectores]] a ipse tal que ''P''<sup>2</sup> = ''P''. 

Le equation de autovalores (eigenvalue)
::<math>A|n>=a_n |n> </math>
defini 
::<math>P_n = |n><n| ,</math>
::<math>A=\sum_n a_n P_n = \sum_n a_n |n><n|. </math>
::<math>I=\sum_n  P_n = \sum_n  |n><n|. </math>


[[Categoria:Mathematica]]