The 2-column answer is the correct one.

1 2 3 ,. . ,. 10 20 30
1 2 3 ,.@(,."(1+_,_) ) 10 20 30  NB. defn of f . g
1 2 3 ,.@(,."_ _) 10 20 30       NB. algebraic simplication
1 2 3 ,.@,. 10 20 30             NB. ranks of ,. are _ _
,. 1 2 3 ,. 10 20 30             NB. defn of @



----- Original Message -----
From: Joey K Tuttle <[EMAIL PROTECTED]>
Date: Friday, February 15, 2008 22:12
Subject: Re: [Jprogramming] Rank of ,.
To: Programming forum <[email protected]>

> Better to ask what version of J. Interesting change between
> j504 and j601 - more fodder to chew...
> 
>     version ''
> j504/2005-03-16/15:30
> Running in: Linux
> Linux version 2.4.20-28.8 ([EMAIL PROTECTED]) (gcc 
> version 3.2 20020903 (Red Hat Linux 8.0 3.2-7)) #1 Thu Dec 18 
> 12:53:39 EST 2003
> 
>     1 2 3 ,. . ,. 10 20 30
> 1 10 1 20 1 30
> 2 10 2 20 2 30
> 3 10 3 20 3 30
> 
> 
> At 23:48  -0500 2008/02/15, Raul Miller wrote:
> >On Fri, Feb 15, 2008 at 11:21 PM,  
> <[EMAIL PROTECTED]> wrote:
> >>    a ,. . ,. b
> >>  1 10 1 20 1 30
> >>  2 10 2 20 2 30
> >>  3 10 3 20 3 30
> >
> >    1 2 3 ,. . ,. 10 20 30
> >1 10
> >2 20
> >3 30
> >
> >What values did you use for a and b?
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