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Re: The Principle "Everything is an expression"

  • To: mathgroup at
  • Subject: [mg101218] Re: [mg101190] The Principle "Everything is an expression"
  • From: Murray Eisenberg <murray at>
  • Date: Sat, 27 Jun 2009 06:02:22 -0400 (EDT)
  • Organization: Mathematics & Statistics, Univ. of Mass./Amherst
  • References: <>
  • Reply-to: murray at

I'm not sure why you think this is a case where "everything is an 
expression" fails.

If you evaluate...


... then you will indeed get an expression in the Mathematica sense. 
Likewise for:


Alexey wrote:
> Hello,
> I think that the underlying principle "Everything is an expression" in
> Mathematica is great and is one of the most exciting advantages of the
> Mathematica system.
> But it is disappointing that this principle is still fails even on
> such basic example as representation of a simple Plot. Consider the
> following:
> g = Plot[Sin[x], {x, 0.2, 10}]
> Show[FullGraphics[g], AspectRatio -> 1/GoldenRatio]
> It is clear that the two generated images are significantly different.
> This means that the function FullGraphics[] does not gives the true
> expression-representation of the first plot. Is it true that in really
> we can not get the true representation of the plot as an expression?
> And the principle mentioned really fails even on this? Or there is
> another way to get it?
> Thank you for your attention a priori.

Murray Eisenberg                     murray at
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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