> 
> https://github.com/fricas/fricas/blob/master/src/algebra//tree.spad#L329
> 
> BinaryTreeCategory(S : SetCategory) : Category ==_
>      Join(BinaryRecursiveAggregate(S), shallowlyMutable,
> finiteAggregate) with
> 
> Is there any reason to keep
> 
>     if % has finiteAggregate then
> 
> inside the add body. Obviously the exports already include
> finiteAggregate, so the condition is true.

I think it was purely historical.  Removed now.

-- 
                              Waldek Hebisch
[email protected] 

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