Thanks Raul and Kip,  Here is how I should have written the four verbs:

NB.  m&v y is defined as m v y 
NB. u&n y  is defined as y u n
   
   f=: 13 :'4&* y'
   g=: 13 :'4*& y'
   h=: 13 :'&*4 y'
   i=: 13 :'*&4 y'
   
   f 
4&*
   g
3 : '4*& y'
   h
3 : '&*4 y'
   i
*&4
   
   5!:4 <'f'
      -- 4
-- & -+- *
   5!:4 <'g'
      -- 3        
-- : -+- ,:'4*& y'
   5!:4 <'h'
      -- 3        
-- : -+- ,:'&*4 y'
   5!:4 <'i'
      -- *
-- & -+- 4
   
   f 5
20
   g 5
|syntax error: g
|       4*&y
   h 5
|syntax error: h
|       &*4 y
   i 5
20
   
My remaining question is about the trees for  g  and  h  .  How did  the
,:  show up in the trees?  What does it mean?  Is it a signal that there is
a syntax error?

Linda


-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of km
Sent: Sunday, March 09, 2014 12:46 AM
To: [email protected]
Subject: Re: [Jprogramming] Oddities in Bond including ,:

A suggestion: where do the understood parentheses go in  4&*y  and in  4*&y
?  --Kip

Sent from my iPad

> On Mar 8, 2014, at 10:33 PM, "Linda Alvord" <[email protected]>
wrote:
> 
> Why is the display of  f  different than  g , h and I ?    
> 
> 
> 
>    NB.  m&v y is defined as m v y 
> 
> 
> 
>   NB. u&n y  is defined as y u n
> 
> 
> 
>    f=: 13 :'4&*y'
> 
> 
> 
>   g=: 13 :'4*&y'
> 
> 
> 
>   h=: 13 :'y&*4'
> 
> 
> 
>   i=: 13 :'y*&4'
> 
> 
> 
>   f 
> 
> 4&*
> 
> 
> 
>   g
> 
> 3 : '4*&y'
> 
> 
> 
>   h
> 
> 3 : 'y&*4'
> 
> 
> 
>   i
> 
> 3 : 'y*&4'
> 
> 
> 
>   5!:4 <'f'
> 
>      -- 4
> -- & -+- *
> 
> 
> 
>   5!:4 <'g'
> 
>      -- 3       
> -- : -+- ,:'4*&y'
> 
> 
> 
>   5!:4 <'h'
> 
>      -- 3       
> -- : -+- ,:'y&*4'
> 
> 
> 
>   5!:4 <'i'
> 
>      -- 3       
> -- : -+- ,:'y*&4'
> 
> 
> 
> Where does  ,:  come from  in the trees for  g , h and I ?
> 
> 
> 
> 
> 
>   f 5
> 
> 20
> 
> 
> 
>   h 5
> 
> 20
> 
> 
> 
>   g 5
> 
> |syntax error: g
> |       4*&y
> 
>   i 5
> 
> |syntax error: i
> |       y*&4
> 
> 
> 
> Finally,  only two work.
> 
> 
> 
> Linda
> 
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