v b. 0 reports the on what the system thinks are the monadic, left, and
right ranks, and those ranks are always positive.  The following phrase
shows another way that 0"_1 has infinite rank.

​
   <@(0"_1) i.2 3
┌───┐
│0 0│
└───┘

​When the "combining ranks" of a verb are negative, the interpretation is
nasty and counterintuitive.  Some of the nastiness were discussed in APL
papers from the late 1980s.​



On Sun, Jun 2, 2013 at 5:10 PM, Raul Miller <[email protected]> wrote:

> I think
>
>    0"_1 b. 0
> _
>
> I think that result should be _1 _1 _1
>
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