Justin Paston-Cooper wrote:
> 
> Hello,
> 
> Is it possible to tacitly define the following dyad?
> 
> f =: 4 : '(>&(2*x)) y'
> 
> If not, is it possible to do it using adverb composition?
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm
> 
> 
Yes, an adverb composition solution is:

 F =: (&*)(>&)~

Now 
 2 F
generates your verb f, i.e 
x f y  is the same as x (2 F) y

PS: composed on a handheld device.
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