cours/.trash/Untitled 1 29.md

aliases, up, tags

aliases	up	tags

\begin{pmatrix} a & c \\ b & d\end{pmatrix}
\begin{pmatrix}1\\0\end{pmatrix}
=
\begin{pmatrix}1 \\ 0\end{pmatrix}
\iff
\begin{pmatrix}a\\b\end{pmatrix} = \begin{pmatrix}1\\0\end{pmatrix}

\begin{pmatrix} a & c \\ b & d\end{pmatrix}
\begin{pmatrix}0\\1\end{pmatrix}
=
\begin{pmatrix}1 \\ 1\end{pmatrix}
\iff
\begin{pmatrix}c\\ d\end{pmatrix} = \begin{pmatrix}1\\ 1\end{pmatrix}

P = \begin{pmatrix}1 & 1 \\ 0 & 1\end{pmatrix}