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Re: new functional operator

  • To: mathgroup at smc.vnet.net
  • Subject: [mg125379] Re: new functional operator
  • From: Murray Eisenberg <murray at math.umass.edu>
  • Date: Sat, 10 Mar 2012 06:18:40 -0500 (EST)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com
  • References: <jit0me$e32$1@smc.vnet.net> <jivd47$n7j$1@smc.vnet.net> <jj9ur8$dtl$1@smc.vnet.net> <201203091109.GAA26863@smc.vnet.net>
  • Reply-to: murray at math.umass.edu

An unfortunate choice of notation, \[Del], for that operator. After all 
\[Del] is a universal notation for grad, the gradient operator.

On 3/9/12 6:09 AM, roby wrote:
> Ok, next version.
>
> One can look for an prefix operator with no buit in meaning to modify
> the function in question such that it acts mapping,
> this way we can use the standard // postfix operator and just modify
> the behavoir of the function:
>
>
> \[Del] fn_ := fn /@ #&
>
> {1,2,3,4}//\[Del]f//\[Del]g
>
> Out[5]= {g[f[1]], g[f[2]], g[f[3]], g[f[4]]}
>
> (looks all nice in a Notebook)
>
>
>
> Robert
>

-- 
Murray Eisenberg                     murray at math.umass.edu
Mathematics & Statistics Dept.
Lederle Graduate Research Tower      phone 413 549-1020 (H)
University of Massachusetts                413 545-2859 (W)
710 North Pleasant Street            fax   413 545-1801
Amherst, MA 01003-9305



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