Problem:
Compute the (pseudo)inverse of
$\left(
\begin{array}{cc}
 3 & -1 \\
 -5 & 3 \\
\end{array}
\right)$.
Answer:
$\left(
\begin{array}{cc}
 \frac{3}{4} & \frac{1}{4} \\
 \frac{5}{4} & \frac{3}{4} \\
\end{array}
\right)$
{'source': 'AMPS', 'file': 'amps/mathematica/linear_algebra/pseudoinverse/9091.txt'}