According ot the dictionary, for dyadic C.

   If q is boxed, the elements of (#b)|>j{q must be distinct for each
j , and the boxes are applied in succession.

But what does this mean?

In particular, why must the residue of the elements of q be distinct?

For example, consider:

   #((i...@! <@A. i.) 3) C."0 1 i.9
6
   #~.((i...@! <@A. i.) 3) C."0 1 i.9
2

Here, we have six distinct, valid left arguments to dyadic C.

But they produce only two distinct results.

How is this useful?

What is the meaning of the left argument here?

Thanks,

-- 
Raul
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