Ah!  Now I understand the meaning of "obverse".

> From: Raul Miller <[email protected]>
> Message-ID:
>         <cad2jou9qphj5r-y5hsjtt2vofvxvuczv49pr_ptwq5d70_v...@mail.gmail.com>
> Inverses are subtle things.
> See also:
>    http://jsoftware.com/help/dictionary/d202n.htm 

...

> From: Rudi Mann <[email protected]>
> Message-ID: <[email protected]>
> Why is a scalar left argument sufficient in this case
> 
>        (10&#.^:_1) 123
> 1 2 3
> 
> but when I omit the power adverb and use the inverse function
directly  
> I need a vector to get the same result?
> 
>       10#:123
> 3
>        10 10 10#:123
> 1 2 3
> 
> Isn't  #:^:_1 the same as #. since they are inverse functions? 
> Rudi

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