Problem:
Compute the (pseudo)inverse of
$\left(
\begin{array}{cc}
 \frac{4}{3} & \frac{31}{9} \\
 \frac{14}{9} & -\frac{1}{9} \\
\end{array}
\right)$.
Answer:
$\left(
\begin{array}{cc}
 \frac{9}{446} & \frac{279}{446} \\
 \frac{63}{223} & -\frac{54}{223} \\
\end{array}
\right)$
{'source': 'AMPS', 'file': 'amps/mathematica/linear_algebra/pseudoinverse/48077.txt'}