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MathGroup Archive 2006

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Re: List of user-defined derivatives

  • To: mathgroup at smc.vnet.net
  • Subject: [mg71614] Re: List of user-defined derivatives
  • From: "Andrew Moylan" <andrew.j.moylan at gmail.com>
  • Date: Sat, 25 Nov 2006 05:36:51 -0500 (EST)
  • References: <200611231041.FAA25261@smc.vnet.net><ek642v$91p$1@smc.vnet.net>

Hi all,

Since posting my message I discovered that these definitions are found
in SubValues[Derivative]. As a side note, does anyone know why
SubValues is largely undocumented, whereas UpValues and DownValues are
documented?

Cheers,
Andrew


On Nov 24, 5:39 pm, "Chris Chiasson" <c... at chiasson.name> wrote:
> they're probably stored in the DownValues of Derivative
>
> On 11/23/06, Andrew Moylan <andrew.j.moy... at gmail.com> wrote:
>
> > Hi all,
>
> > When the derivative of a function is specified like this:
> >   f' = 6 &;
> > or alternatively like this:
> >   f'[x_] = 6;
> > the definitions are not stored in UpValues[f] or DownValues[f]. I
> > understand this is why Clear[f] doesn't clear definitions for
> > derivatives. My question is: where are these definitions stored, and
> > how can one obtain a list of user-defined derivatives such as this one?
> 
> > Cheers,
> > Andrew--http://chris.chiasson.name/


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