The quotient map \pi is the Linear Map V \to V / U such that:
\begin{equation} \pi(v) = v+U \end{equation}
for v \in V. I.e.: the quotient map is affine subsetification map given a vector.
The quotient map \pi is the Linear Map V \to V / U such that:
for v \in V. I.e.: the quotient map is affine subsetification map given a vector.