Question: defining a function on an abstract group

Hi,

I have defined my group in maple as

G:=grelgroup({u,v,w},{[u,v,u,1/w],[v,u,v,1/w],[u,u],[v,v],[w,w]})

I now want to define a function on GxGxG. Previously I have used array, i.e. f:=array(0..2,0..3,0..4), but how do I do it for elements in G?

Many thanks,

Jenny

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