Re: [Reduce-algebra-developers] IN_TEX questions

[Prof T. R. <Pro...@pr...>]

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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