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Re: How to pass a function to a function?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg93658] Re: [mg93653] How to pass a function to a function?
  • From: "Aaron Fude" <aaronfude at gmail.com>
  • Date: Fri, 21 Nov 2008 05:31:08 -0500 (EST)
  • References: <200811200957.EAA20655@smc.vnet.net>

Thanks, but I don't need the Laplacian. I need a different operator.
Laplacian was just an e.g.

Do you know how to do it?

On Thu, Nov 20, 2008 at 10:05 AM, Murray Eisenberg <murray at math.umass.edu>wrote:

> 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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