Projection map
= Projection map
{wiki=Projection_(mathematics)}
A projection map from a Cartesian product selects specified coordinates, for example $p_j:\prod_iX_i\to X_j$ with $p_j((x_i)_i)=x_j$.
= Projection map
{wiki=Projection_(mathematics)}
A projection map from a Cartesian product selects specified coordinates, for example $p_j:\prod_iX_i\to X_j$ with $p_j((x_i)_i)=x_j$.