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Re: How to pass a function to a function?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg93676] Re: [mg93653] How to pass a function to a function?
  • From: Murray Eisenberg <murray at math.umass.edu>
  • Date: Fri, 21 Nov 2008 05:34:22 -0500 (EST)
  • Organization: Mathematics & Statistics, Univ. of Mass./Amherst
  • References: <200811200957.EAA20655@smc.vnet.net>
  • Reply-to: murray at math.umass.edu

You don't have to write it yourself!  You may load and use the 
VectorAnalysis package.  See the documentation for that package and, in 
particular, for the function (i.e., operator) Laplacian that it defines.

Aaron Fude wrote:
> Hi,
> 
> How does one write a call a function that represents an operator? In
> other words, it takes a function and returns another function.
> 
> For example, if you think of the Laplacian I want to do something like
> this (pseudo code):
> 
> f[x_, y_] := x^4 +y^4
> g = Laplacian[f];
> 
> N[g[1, 1], 50]
> 
> How would one write "Laplacian"?
> 
> Many thanks in advance,
> 
> Aaron
> 

-- 
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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