e> treats the first parameter <em class="parameter"><code>c</code></em> as a column
            vector (matrix with one column) and the second parameter <em class="parameter"><code>r</code></em> as a row vector
            (matrix with one row) and does a linear algebraic matrix multiply <em class="parameter"><code>c</code></em> * <em class="parameter"><code>r</code></em>,
            yielding a matrix whose number of rows is the number of components in <em class="parameter"><code>c</code></em> and
        