On 01/27/2018 08:13 PM, 'Nasser M. Abbasi' via FriCAS - computer algebra
system wrote:
> FYI;
>
> I think the Latex code generated by Fricas here might not be valid. But I am
> not
> sure.
>
> But it hangs Lualatex when I compile it and when I am using breqn package.
>
> Here it is
>
> ------------------------
> ii:=integrate(1/(a^2-b^2*x^2), x)
> tex(ii::OutputForm::TexFormat)
>
> [
> "{{\log \left( {{{b \ x}+a}} \right)} -{\log \left( {{{b \ x} -a}}
> \right
> )}} \over {2 \ a \ b}"
> ]
> ------------------------
>
> Now I put the above code in a latex file and compile it:
>
> |\documentclass[]{article}\usepackage{amsmath}\usepackage{breqn}\begin{document}\begin{dmath*}[frame={.5pt}]{{\log\left({{{b
>
> \ x}+a}}\right)}-{\log\left({{{b \ x}-a}}\right)}}\over{2 \ a \
> b}\end{dmath*}\end{document}|
>
>
> Using lualatex foo.tex
>
> This seems to hangs or crashes lualatex. amsmath does not like the latex
> code
> and gives warning
>
> |Package amsmath Warning: Foreign command \over; (amsmath)\fracor
> \genfracshould
> be used instead (amsmath)on input line 8.|
>
>
> May be \over can be replaced by \frac ?
>
> I posted this question
> at
> https://tex.stackexchange.com/questions/412450/why-this-latex-code-hangs-lualatex-foreign-command-over
>
> asking for workaround.
>
> Thanks
> --Nasser
You can replace tex.spad by
https://github.com/hemmecke/fricas/blob/master-hemmecke/src/algebra/tex.spad
and use
https://github.com/hemmecke/fricas/blob/master-hemmecke/src/doc/fricasmath.sty
or use
https://github.com/hemmecke/fricas/blob/mathjax/src/algebra/mathjax.spad
You have much more flexibility of what latex output is generated.
In fact, it generates LaTeX not plain TeX.
Ralf
===========================================================
(1) -> ii::OutputForm::TexFormat
(1) ["\begin{fricasmath}{}", "\SYMBOL{ii}", "\end{fricasmath}"]
Type:
TexFormat
(2) -> ii:=integrate(1/(a^2-b^2*x^2), x)
log(b x + a) - log(b x - a)
(2) ---------------------------
2 a b
Type:
Union(Expression(Integer),...)
(3) -> mjx := (ii::OutputForm::MathJaxFormat)
(3)
["$$",
"\frac{\log{\left(b\,x+a\right)}-{\log{\left(b\,x-{a}\right)}}}{2\,a\,b}",
"$$"]
Type:
MathJaxFormat
(4) -> concat concat [prologue mjx, format mjx, epilogue mjx]
(4)
"$$\frac{\log{\left(b\,x+a\right)}-{\log{\left(b\,x-{a}\right)}}}{2\,a\,b}$$"
Type:
String
===============
\documentclass{article}
\begin{document}
$$\frac{\log{\left(b\,x+a\right)}-{\log{\left(b\,x-{a}\right)}}}{2\,a\,b}$$
\end{document}
===================================================================
or with my version of TexFormat:
(5) -> tx := (ii::OutputForm::TexFormat)
(5)
["\begin{fricasmath}{}",
"\frac{\log{\PAREN{\SYMBOL{b}\TIMES
\SYMBOL{x}+\SYMBOL{a}}}-{\log{\PAREN{",
"\SYMBOL{b}\TIMES \SYMBOL{x}-{\SYMBOL{a}}}}}}{2\TIMES
\SYMBOL{a}\TIMES ",
"\SYMBOL{b}}", "\end{fricasmath}"]
Type:
TexFormat
(6) -> concat concat [prologue tx, format tx, epilogue tx]
(6)
"\begin{fricasmath}{}\frac{\log{\PAREN{\SYMBOL{b}\TIMES
\SYMBOL{x}+\SYMBOL{a}
}}-{\log{\PAREN{\SYMBOL{b}\TIMES \SYMBOL{x}-{\SYMBOL{a}}}}}}{2\TIMES
\SYMBOL{
a}\TIMES \SYMBOL{b}}\end{fricasmath}"
Type:
String
====================
\documentclass{article}
\usepackage{fricasmath}
\begin{document}
\begin{fricasmath}{}
\frac{\log{\PAREN{\SYMBOL{b}\TIMES
\SYMBOL{x}+\SYMBOL{a}}}-{\log{\PAREN{\SYMBOL{b}\TIMES
\SYMBOL{x}-{\SYMBOL{a}}}}}}{2\TIMES \SYMBOL{a}\TIMES
\SYMBOL{b}}\end{fricasmath}
\end{document}
--
You received this message because you are subscribed to the Google Groups
"FriCAS - computer algebra system" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at https://groups.google.com/group/fricas-devel.
For more options, visit https://groups.google.com/d/optout.
