one,one?

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one,one?

$\begin{usage} one~n\\ one?~A \end{usage}$

$\begin{signatures} one: & \htmlref{\texttt{MachineInteger}}{MachineInteger} $\... ...%\\ one?: & \% $\to$\ \htmlref{\texttt{Boolean}}{Boolean}\\\end{signatures}$

$\begin{params} {\em n} & \htmlref{\texttt{MachineInteger}}{MachineInteger} & an integer\\ {\em A} & \% & A matrix\\\end{params}$

$\begin{descr} one(n) returns an $n$\ by $n$\ identity matrix, while one?(A) ret... ...ace if {\em A} is an identity matrix, {\it false}\xspace otherwise. \end{descr}$

See Also

square?,zero,zero?

Manuel Bronstein 2000-12-13