product

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product $$\prod $% WIDTH=19 HEIGHT=31$

$\includegraphics[height=10mm]{images/product}% WIDTH=49 HEIGHT=46$

Multiply along a given axis.

The operator can be placed on the canvas in two ways:

From the Reductions Operations (``reduction'') toolbar $\resizebox{!}{2ex}{\includegraphics{images/sum}}% WIDTH=15 HEIGHT=14$ ; or
By typing the letters ``product'' on the canvas and then pressing the Enter key.

The same result can be achieved by collapsing the relevant Ravel axis after choosing $$\Pi$% WIDTH=16 HEIGHT=15$ from the ``Set next aggregation'' context menu.