       TeXForm and negative exponents

• To: mathgroup at smc.vnet.net
• Subject: [mg32239] TeXForm and negative exponents
• From: Jens Dreger <jens.dreger at physik.fu-berlin.de>
• Date: Wed, 9 Jan 2002 03:17:34 -0500 (EST)
• Organization: Freie Universitaet Berlin
• Sender: owner-wri-mathgroup at wolfram.com

Hi all!

I want to save some expressions in TeX-format like so:

Put[TeXForm[expr],file]

where expr contains exponentials with negative exponents
which I want to show up in the output as _negative_.
For some reason, Mathematica always "simplifies" the
expression so it only contains positive exponents.

Example:

In:= TeXForm[1/(1 + 2 Exp[-3 t])]
Out:= \frac{1}{1 + \frac{2}{e^{3\,t}}}

Ok, so I thought, HoldForm might help:

In:= TeXForm[HoldForm[(1 + 2 Exp[-3 t] )]]
Out:= 1 + 2\,\exp (-3\,t)

Great, only my expression does not contain Exp[], but
the 2d form. In that case, HoldForm does not seem to do
the trick...

1
In:= TeXForm[HoldForm[--------------]
(1+2 e^{-3 t})

Out:= \frac{1}{1 + \frac{2}{e^{3\,t}}}

The output I want is:

\frac{1}{1 + 2 e^{-3 t}}

Wrapping StandardForm around expr does seem to help,
but then the TeX-Output contains all kinds of special
commands, which I don't want. In this small example
it's ok, but not on the large expressions.

Is there an easy way, to get TeXFrom to do what I intend?

Thanks a lot in advance!

Jens.



• Prev by Date: Closing a dialogue box with Mathematica
• Next by Date: Holding Arguments in a Second Argument List
• Previous by thread: Re: Closing a dialogue box with Mathematica
• Next by thread: Re: TeXForm and negative exponents