Re: [Reduce-algebra-developers] IN_TEX questions

[martin g. <a.m...@ic...>]

Thanks a lot Tony, 

your comments and the example are very helpful.

Your comment on the ;end; got me thinking about echo. If I turn echo
off at the start and on at the end of each reduce environment, then
the entire input LaTeX is processed. Then I only have “off echo;” at
the start of each in the generated LaTeX file and this is easy to
remove with a little post-processing.

I tried using “off echo $” but this is ignored running inside
IN_TEX. Then I tried removing “off echo” and instead using $ to
terminate all the commands, but using $ is ignored for any command I
tried. I have started looking at the source for IN_TEX, but my lisp is
limited to Emacs Lisp, so I have some reading to do.

Martin

> On 26. Jan 2024, at 20:06, Prof Tony Roberts via Reduce-algebra-developers <red...@li...> wrote:
> 
> Hi,
> 
> I use in_tex extensively for a couple of decades, and indeed it was 
> I who encouraged AN to incorporate the command into Reduce. So let 
> me answer two separate issues in two separate emails.
> 
> 1. "off echo"  I have never had any trouble with it, nothing like 
> you describe.  So cannot help there without more information. 
> (Although something changed with "off echo" 5-10 years ago in that 
> it itself now appears spuriously in some of my output when before it 
> did not!)
> 
> 2. Re "\begin{reduce} and \end{reduce} "  First the ";end;"  that 
> you code also has to be within a "\begin{reduce} ;end; \end{reduce} 
> " in order for Reduce to execute it.  That it is beyond the 
> \end{document} is immaterial to Reduce.
> 
> Second, I recommend using fancyvrb package to typeset the reduce 
> code.  In your preamble put
> 
> \usepackage{fancyvrb}
> \def\reduce{}% protect against earlier defns
> \renewenvironment{reduce}%
>     {\Verbatim[numbers=left,firstnumber=\the\inputlineno]}%
>     {\endVerbatim}
> 
> The result for your amended example latex document is attached.
> 
> Tony
> 
> 
> On 26/1/2024 10:13 pm, martin gregory via Reduce-algebra-developers 
> wrote:
>> while trying to use IN_TEX I came across the following questions
>> 
>> 1. using OFF ECHO causes IN_TEX to ignore everything in the input file
>> following the first \end{reduce}. If I use a $ terminator for the
>> IN_TEX command, only the reduce output and nothing else is
>> displayed. Since I would like to be able to display only the output
>> and not the commands, how can I do this?
>> 
>> 2. IN_TEX writes \begin{reduce} and \end{reduce} to the output LaTeX
>> file which causes a fatal error when compiling the LaTex (TeX Live
>> 2023). If I write
>> 
>> \newenvironment{reduce}{}{}%
>> 
>> before the \documentclass command the compilation works. I would
>> expect that there is a definition of a reduce environment but
>> 
>> find Reduce-svn6658-src -iname '*.sty' -exec grep "newenv" {} \;
>> 
>> returns only a definition
>> 
>> \newenvironment{describe}[1]{\par{\bf 
>> #1}\begin{indented}}{\end{indented}}
>> 
>> for the three files:
>> 
>> doc/misc/reduce.sty
>> doc/primers/reduce.sty
>> doc/util/reduce.sty
>> 
>> Searching in *.tex finds many more but no 'reduce'. Does it exist?
>> 
>> 3. Using IN_TEX always produces a 99 error, e.g.
>> 
>> +++ error: (99 ("End-of-file read in file" "rlfi-01-src.tex")) (
>> "End-of-file read in file" "rlfi-01-src.tex")
>> 
>> even though I have ;end; at the end of the file. Is this expected?
>> 
>> I have compiled revision reduce 6658 (csl) from source on Slackware
>> (kernel 5.15.145).
>> 
>> Martin Gregory
>> 
>> Test program and LaTeX file:
>> 
>> --------------------rlfi-01.red-------------------------
>> load_package rlfi ;
>> out t ; % to drop rlfi preamble
>> q:=(y^2+2*y)^2/(2*a);
>> on latex, lasimp ;
>> out "rlfi-01.tex" ;
>> in_tex "rlfi-01-src.tex" ;
>> shut "rlfi-01.tex" ;
>> off latex ; % after shut to avoid writing \end{document}
>> ;end;
>> --------------------rlfi-01-src.tex---------------------
>> \documentclass[11pt,a4paper]{article}
>> \usepackage[pdftex,bookmarks,colorlinks,linkcolor=blue]{hyperref}
>> \title{RLFI in file read by IN\_TEX}
>> \author{Martin Gregory}
>> \begin{document}
>> \maketitle
>> We define q as follows:
>> 
>> \begin{reduce}
>> write q ;
>> \end{reduce}
>> \end{document}
>> ;end;
>> 
>> 
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> 
> -- 
> ---------------------------------------------------------------------
> Four books and a toolbox:
> 
> * (2020) Linear Algebra for the 21st Century
> Oxford University Press. isbn: 978-0-19-885640-5, 978-0-19-885639-9
> https://global.oup.com/academic/product/linear-algebra-for-the-21st-century-9780198856399
> 
> * (2015) Model emergent dynamics in complex systems
> SIAM, Philadelphia. isbn: 9781611973556.
> https://epubs.siam.org/doi/10.1137/1.9781611973563
> 
> * (2009) Elementary calculus of financial mathematics
> SIAM, Philadelphia. isbn: 978-0-898716-67-2.
> https://epubs.siam.org/doi/10.1137/1.9780898718225
> 
> * (1994) A one-dimensional introduction to continuum mechanics
> World Sci. isbn: 978-981-02-1913-0.
> 
> * (2020) with John Maclean, and J. E. Bunder; Equation-Free
> function toolbox for Matlab/Octave.
> http://github.com/uoa1184615/EquationFreeGit
> 
> Emeritus Professor A.J. Roberts,  FAustMS
> School of Mathematical Sciences,  University of Adelaide
> https://profajroberts.github.io/
> mailto:Pro...@pr...
> http://orcid.org/0000-0001-8930-1552
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