Document Classes ⇒ Framed and indented theorem's with ntheorem

[Bozack]

Hi

I'm using the package ntheorem to make theorems - and I would like a special layout to these, which I'm not really sure is possible (but I'll ask anyway ).

I'd like the theorems to be like the default theorems made by

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Code, edit and compile here:

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\usepackage[amsmath,thmmarks]{ntheorem}
\theoremstyle{plain}
\theorembodyfont{\small}
 
 
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Run LaTeX here

only with half a centimeter of indentation and a grayish line following the theorem vertically on the left side. It's important that this gray line follow the theorem also over page-breaks.

I've tried to draw what I want it to look like:

page.png (98.71 KiB) Viewed 11169 times

I hope someone has an idea of how this can be done

[Stefan Kottwitz]

Hi Bozack,

that should be possible. Load ntheorem with the framed option, define a framed theorem, redefine the frame command used. You will get details from the ntheorem documentation.
It could look like:

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Code, edit and compile here:

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\usepackage[amsmath,thmmarks,framed]{ntheorem}
\theoremstyle{plain}
\theorembodyfont{\small}
\usepackage{framed}
\usepackage{color}
\definecolor{gray}{rgb}{0.6,0.6,0.6}
\renewcommand*\FrameCommand{{\color{gray}\vrule width 5pt \hspace{10pt}}}
\newframedtheorem{defn}{Definition}
 
 
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Run LaTeX here

It would work also with page breaks.

Stefan

[Bozack]

hm, my ntheorem doesn't recognize the command "framed". I get the error

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Code, edit and compile here:

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("C:\Program Files\MiKTeX 2.5\tex\latex\ntheorem\ntheorem.sty"
Style `ntheorem', Version 1.203 <2002/01/07>
Package: ntheorem 2002/01/07 1.203
\theorem@style=\toks27
\theorem@@style=\toks28
\theorembodyfont=\toks29
\theoremnumbering=\toks30
\theorempreskipamount=\skip72
\theorempostskipamount=\skip73
\theoremindent=\dimen164
\theorem@indent=\dimen165
\theoremheaderfont=\toks31
\theoremseparator=\toks32
\theoremsymbol=\toks33
\qedsymbol=\toks34
\theoremkeyword=\toks35
\qedsymbol=\toks36
\thm@topsepadd=\skip74
Package ntheorem Info: Option `thmmarks' loaded on input line 975.
\c@endNonectr=\count139
\c@currNonectr=\count140
\mysavskip=\skip75
Package ntheorem Info: option `amsmath' handling for `thmmarks' loaded on input
 line 975.
\thm@amstmpdepth=\dimen166
! LaTeX Error: Unknown option `framed' for package `ntheorem'.
See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.975 \ProcessOptions\relax
                           
The option `framed' was not declared in package `ntheorem', perhaps you
misspelled its name. Try typing  <return>  to proceed.
)
 
 
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Run LaTeX here

[Stefan Kottwitz]

In that case you probably have to update your ntheorem package, you are using v1.203 from 2002/01/07, it would work with 1.25 or higher.

Stefan

[Bozack]

In that case you probably have to update your ntheorem package, you are using v1.203 from 2002/01/07, it would work with 1.25 or higher.

After an update it worked thanks

How did you come up with the command

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\renewcommand*\FrameCommand{{\color{gray}\vrule width 4pt \hspace{10pt}}}
 
 
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?

If I want to edit it somehow. Or, where is the \FrameCommand defined?

[Stefan Kottwitz]

Though ntheorem defines the macro \theoremframecommand I didn't use it, it seemed quicker to me just to use features of the framed package. I've taken \FrameCommand from the source of that package, you could look for it inside framed.sty on your computer or on CTAN.
The documentation of framed is contained in it's source file.

Stefan