[l2h] Inconsistent results in a LaTeX2HTML, output, .html file for the command {\mathrsfs {L}} and no script H for thecommand {\mathrsfs {H}}, each using \usepackage{mathrsfs, ...., ....., .....}

Pat Somerville l_pat_s at hotmail.com
Wed Jun 8 20:16:35 CEST 2011

Hello again, Professor Moore.  By following some of your suggestions I have 
the contents of the file Throwaway10.tex below.  After executing latex and 
latex2html commands on it, gratefully all of the symbols I wanted to be 
displayed, both from inline and within the \begin{equation}, \end{equation} 
pair, were visibly acceptably displayed in the resulting file 

\setlength{\parskip}{20pt plus 2pt minus 2pt}
\newcommand{\etasigdot}{\ensuremath{\dot{\eta}_{\sigma }}}
\vspace{5 mm}
\large{\Hint=\dfrac{\partial \Lint}{\partial 

\noindent For inline mathematics within text I am trying $\Lint$.

I found that I could use either \small or \large for the equation and obtain 
visibly acceptable results in the file Throwaway10.html.  However, after 
replacing \large by \normalsize, the LaTeX run on Throwaway10.tex reported 
the \normalsize command was invalid, if I remember correctly; and the 
LaTex2HTML run on Throwaway10.tex resulted in Lint and Hint within the 
equation which did not appear script-like in the resulting Throwaway10.html 
file; but I think the inline script Lint was probably displayed properly in 
Throwaway10.html.  Using no macro, such as \large or \small, at all before 
the equation, I think produced the same results in the resulting .html file 
as using \normalsize before it.

Back to using the \large macro, three images were attempted to be produced 
by LaTeX2HTML:

img1.png, the whole equation as one image;
img2.png, a blank image as viewed in the file manager PCManFM 0.9.8, or a 
very small, doubly-grey-toned image when viewed in the Gnu Not Unix (GNU) 
Image Manipulation Program (GIMP) [In the LaTeX run on the corresponding 
Throwaway10.tex file with the above contents a pstoimg and pnmcrop error was 
reported; but there was no visible consequence of it of any kind in the file 
Throwaway10.html when viewed in a Konqueror Web browser.  Therefore without 
consequence, if I wish, I could ignore this problem, whatever was its 
cause.] and
img3.png, for the script Lint, which I guess might have corresponded to the 
inline image within the text.

As for "diagnosing" the root cause of the problem when using \normalsize or 
no macro at all before the equation, I did not get very far.  I finally 
understood that I should in the subfolder entitled "Throwaway10" execute the 
command "latex images.tex" produced within the subfolder "Throwaway10" by 
LaTeX2HTML.  But I wasn't sure of everything to do after that.  Toward 
"diagnosing" problems with images should "latex2html -debug..." afterwards 
be run on images.tex in the subdirectory "Throwaway10" or on Throwaway10.tex 
in its directory?

>From the Internet I learned that your use of \, within mathematics adds a 
small amount of, I presume, horizontal space.  Thanks for your valuable 
help, Professor Moore.  As a result of what you wrote me so far, even 
without understanding everything or knowing how to "diagnose" all image 
problems, I can gratefully at least produce visibly acceptable script-symbol 
output in a .html file.

From: "Pat Somerville" <l_pat_s at hotmail.com>
Sent: Tuesday, June 07, 2011 10:54 PM
To: <latex2html at tug.org>
Subject: Re: [l2h] Inconsistent results in a LaTeX2HTML, output,.html file 
for the command {\mathrsfs {L}} and no script H for thecommand {\mathrsfs 
{H}}, each using \usepackage{mathrsfs, ....,....., .....}

> Thanks, Professor Moore, for kindly taking an interest in the problems I
> have been facing, as mentioned in this chain of e-mail letters.  I 
> attached
> the three files images.tex, images.log, and images.out for your analysis.
> Before I make any further changes of my own, these files should correspond
> to the version of the file Throwaway8.tex in my e-mail letter before this
> one in this chain of e-mail letters.  You are welcome to use the contents 
> of
> the file Throwaway8.tex to experiment or further analyze toward 
> "diagnosing"
> the problem with the image for script L_{int}, etc.
> Pat
> --------------------------------------------------
> From: "Ross Moore" <ross.moore at mq.edu.au>
> Sent: Tuesday, June 07, 2011 6:18 PM
> To: "Pat Somerville" <l_pat_s at hotmail.com>
> Cc: "Latex2Hmtl list" <latex2html at tug.org>
> Subject: Re: [l2h] Inconsistent results in a LaTeX2HTML, output, .html 
> file
> for the command {\mathrsfs {L}} and no script H for the command {\mathrsfs
> {H}}, each using \usepackage{mathrsfs, ...., ....., .....}
>> Hello Pat,
>> On 08/06/2011, at 7:12 AM, Pat Somerville wrote:
>>> Hello again. I had trouble producing a script L_{int}
>> Firstly, this would look better as:   $\mathscr{L}_{\mathrm{int}}$
>> otherwise the spacing between the letters 'i' 'n' 't' will be wrong,
>> as well as the style. Such abbreviations of words with mathematics
>> are meant to be in upright text, not slanted.
>> (e.g. \log \sin  \cos \tan etc. )
>> Secondly, whenever you want constructions like this it is best
>> to define your own macro:
>>  \newcommand{\Lint}{\mathscr{L}_{\mathrm{int}}}
>> or even
>>  \newcommand{\Lint}{\ensuremath{\mathscr{L}_{\mathrm{int}}}}
>> This simplifies the appearance of your typescript (i.e the body
>> of your LaTeX source)
>>        Here is a sentence containing $\Lint$.
>> especially when you are using it within more complicated expressions.
>> e.g.
>> \newcommand{\Lint}{\mathscr{L}_{\mathrm{int}}
>> \newcommand{\Hint}{\mathscr{H}_{\mathrm{int}}
>> \newcommand{\etasigdot}{\dot{\eta }_{\sigma }}
>>   $\Hint = \dfrac{\partial \Lint}{\partial \etasigdot}\,\etasigdot - 
>> \Lint
>> = -\Lint $
>>> something like \fontsize{12}{14}\selectfont ${\mathscr {L}}_{int}$,
>>> altogether something like this:
>>> \begin{equation}
>>> \mbox{Here is a sentence containing \fontsize{12}{14}\selectfont
>>> ${\mathscr {L}}_{int}$.}
>>> \end{equation}
>> Why are you specifying sizes like this?
>> LaTeX provides macros  \large  \Large  etc.  to do this properly
>> and consistently for both the text and math content.
>> Stuff like  \fontsize{12}{14}\selectfont  should only ever be used
>> within macro expansions, written by experts who have worked through
>> every aspect of the consequences.
>>> I found a manual for LaTeX2HTML on the Internet at
>>> http://www.astr.ku.dk/software/latex2html/manual/node8.htm#SECTION00052100000000000000.
>>> According to what I read there to implement a .sty file of the form
>>> Name.sty there should be a corresponding file of the form Name.perl
>>> within a directory ..../styles. But I did not find any such 
>>> mathrsfs.perl
>>> file in my installation of the directory ..../styles; a search of the
>>> entire Internet for mathrsfs.perl also yielded no found results. So I
>>> presume that a mathrsfs.perl file might not exist in public.
>> That is true. There is no  mathrsfs.perl  with LaTeX2HTML.
>> All it does is change the font being used for script letters.
>> This is not relevant at all to HTML, when you need to be creating
>> images of these characters anyway.
>>> Could some of the awkwardness I found using mathrsfs with LaTeX2HTML be
>>> because of that?
>> LaTeX2HTML always has difficulty making images of script letters,
>> because they place ink *outside* the stated typesetting width
>> and/or height.
>> This means that the black "cropping bars", that LaTeX2HTML uses
>> to try to capture the necessary size for an image, are quite likely
>> to not catch it all. Then images do not get cropped to the correct
>> size. Hence you may see black lines at the left and bottom
>> of an image.
>>> Assuming so, could one of you familiar with the Perl scripting language
>>> suggest a mathrsfs.perl which would minimally enable the implementation
>>> of the command \mathscr, apparently used by or within the software
>>> package mathrsfs.sty, for various font point sizes and letters of the
>>> common Roman alphabet for the English language?
>>> Toward "diagnosing" some problems in generating an inline (within text)
>>> script L_{int} with the contents below of the file Throwaway8.tex, I
>>> tried roughly following a few of the suggestions I found on the Internet
>>> by:
>>> 1) generating a .tex file I might have called Throwaway9.tex with
>>> contents similar to the following:
>>> \documentstyle{article}
>>> \begin{document}
>>> some text \fbox{ more text }
>>> \end{document}
>>> .
>>> I didn't discover any problems as a result of executing the command
>>> "latex Throwaway9.tex".
>> You will never see problems this way.
>> To get an idea of what may be going wrong, you need to do
>>     latex images.tex
>> where the file images.tex was created by a fresh run
>> of LaTeX2HTML, within a subdirectory of the directory
>> where your LaTeX source resides.
>> Best is to use   latex2html -debug ....
>> so that all temporary files are retained.
>> Then you can look at all aspects of what was done.
>>> 2) As a result of executing the command "latex Throwaway8.tex", with the
>>> file Throwaway8.tex containing the contents below, I saw messages like
>>> "Font shape 'U/rsfs/m/n' in size <13> not available
>>> size <12> substituted in input line 10". But apparently that was
>>> inconsequential because the inline script L_{int} was gratefully
>>> displayed well in the resulting output file Throwaway8.dvi when viewed 
>>> in
>>> the program Okular.
>>> 3) inputting the command: dvips -o Throwaway8.ps Throwaway8.dvi
>>> My notes do not indicate any problems that command.
>>> 4) inputting the command: gs -dNODISPLAY pstoppm.ps
>> Why?
>> What is the file  pstoppm.ps ?
>> You shouldn't have a file of this name as part of your job.
>> Shouldn't it be   Throwaway8.ps  ???
>>> Error: /undefinedfilename in (pstoppm.ps)
>>> ...
>>> Last OS error: 2
>>> GPL Ghostscript 9.00: Unrecoverable error, exit code 1
>>> 5) inputting the command: pnmcrop Throwaway8.ppm >Throwaway8.crop.ppm
>>> pnmcrop: Unable to open file 'Throwaway8.ppm' for reading ....(No such
>>> file or directory)
>>> 6) After running a latex2html command on the file Throwaway8.tex to
>>> generage png (Portable Network Graphics) images, I found the following
>>> messages:
>>> pnmcrop: The image is entirely background; there is nothing to crop.
>>> pstoimg: Error: "/usr/bin/pnmcrop -verbose -sides -bot <
>>> /tmp/l2h5852/p5934.pnm > /tmp/l2h5852/p5934.t02" failed:
>>> Image "/tmp/l2h5852/p5934.pnm" is PPM, 4x5
>>> Running "/usr/bin/ppmquant -floyd 256 < /tmp/l2h5852/p5934.pnm |
>>> /usr/bin/pnmtopng -interlace -trans 'gray85' > img6.png"
>>> .
>>> In the file images.log a missing } was reported and reported as 
>>> inserted,
>> That spells trouble.
>> I suspect that your use of unnecessary macros like  \fontsize
>> and  \selectfont  has screwed things up significantly.
>> Send me the images.tex file, because that certainly will contain
>> the clues as to what is going wrong.
>>> apparently associated with a mathscr-containing line in Throwaway8.tex.
>>> But the program LaTeX did not display such a message in the same
>>> terminal-program window in which the command "latex Throwaway8.tex" was
>>> entered using the same file Throwaway8.tex. As a result of latex2html
>>> executions it has been common to see the messages
>>> "
>>> *********** WARNINGS ***********
>>> No implementation found for style `mathrsfs'
>>> No implementation found for style `hyperref'
>>> Unknown math command: \mathscr , image needed.
>>> Done."
>>> displayed after inputting a latex2html command on a file like
>>> Throwaway8.html. The message "No implementation found for style
>>> `hyperref'" is understandable because, except within
>>> \usepackage{....,...,hyperref,......}, I did not use \hyperref in my
>>> current file Throwaway8.tex. However, the messages "No implementation
>>> found for style `mathrsfs'" and "Unknown math command: \mathscr, image
>>> needed" are strange because the mathrsfs-package command \mathscr does
>>> appear several times within the file Throwaway8.tex.--So I guess that
>>> these messages might mean that LaTeX2HTML did not recognize one or more
>>> appearances of \mathscr within Throwaway8.tex; or perhaps some part of
>>> LaTeX2HTML could not work with \mathscr because no image was produced
>>> which could be associated with that command(??).
>>> Please help with an answer to a question above, an explanation of the
>>> cause of the problems with the Ralph Smith Formal Script (rsfs) package
>>> mathrsfs using LaTeX2HTML, and/or solutions which are less awkward than
>>> the "workaround" solutions of which I wrote in this chain of e-mail
>>> letters. Thanks for your consideration.
>>> Pat
>> Hope this helps,
>> Ross
>> ------------------------------------------------------------------------
>> Ross Moore                                       ross.moore at mq.edu.au
>> Mathematics Department                           office: E7A-419
>> Macquarie University                             tel: +61 (0)2 9850 8955
>> Sydney, Australia  2109                          fax: +61 (0)2 9850 8114
>> ------------------------------------------------------------------------

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