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sagemath 8.9.

I do not remember if I mentioned this before or not. I googled and did not find anything. If this is already mentioned and known issue, I am sorry and please feel free to close this.

Fricas returns li in one result, which gets translated log_integral by sagemath. But since in Latex, the _ is important , it looks bad when typeset. also, the it should be a math operator, as in \log_integral but not it just shows as log_integral.

Here is an example.

sage: var('t')
t
sage: result=integrate(1/log(t)^2,t, algorithm="fricas")
sage: result
(log(t)*log_integral(t) - t)/log(t)
sage: latex(result)
\frac{\log\left(t\right) log_integral\left(t\right) - t}{\log\left(t\right)}

When compiling the above latex, it shows as

\documentclass[11pt]{article}
\usepackage{amsmath}

\begin{document}
$\frac{\log\left(t\right) log_integral\left(t\right) - t}{\log\left(t\right)}$
\end{document}

Using Fricas directly

(3) -> result:=integrate(1/log(t)^2,t)

        li(t)log(t) - t
   (3)  ---------------
             log(t)
                                         Type: Union(Expression(Integer),...)
(4) -> latex(result)                  

   (4)
  "{{{li \left( {t} \right)} \  {\log \left( {t} \right)}} -t} \over {\log \lef
  t( {t} \right)}"
                                                                 Type: String
(5) ->

Compiling the above gives

\documentclass[11pt]{article}
\usepackage{amsmath}

\begin{document}
${{{li \left( {t} \right)} \  {\log \left( {t} \right)}} -t} \over {\log \left( {t} \right)}$
\end{document}

Not perfect either (since 'li should have been \li and made an operator) but it looks better that latex from sagemath,

Is this a known issue? Is there a workaround? editing these outputs by hand each time and fixing them it not practical for me.

Thank you --Nasser

sagemath 8.9.

I do not remember if I mentioned this before or not. I googled and did not find anything. If this is already mentioned and known issue, I am sorry and please feel free to close this.

Fricas returns li in one result, which gets translated log_integral by sagemath. But since in Latex, the _ is important , it looks bad when typeset. also, the it should be a math operator, as in \log_integral but not now it just shows as log_integral..

Here is an example.

sage: var('t')
t
sage: result=integrate(1/log(t)^2,t, algorithm="fricas")
sage: result
(log(t)*log_integral(t) - t)/log(t)
sage: latex(result)
\frac{\log\left(t\right) log_integral\left(t\right) - t}{\log\left(t\right)}

When compiling the above latex, it shows as

\documentclass[11pt]{article}
\usepackage{amsmath}

\begin{document}
$\frac{\log\left(t\right) log_integral\left(t\right) - t}{\log\left(t\right)}$
\end{document}

Using Fricas directly

(3) -> result:=integrate(1/log(t)^2,t)

        li(t)log(t) - t
   (3)  ---------------
             log(t)
                                         Type: Union(Expression(Integer),...)
(4) -> latex(result)                  

   (4)
  "{{{li \left( {t} \right)} \  {\log \left( {t} \right)}} -t} \over {\log \lef
  t( {t} \right)}"
                                                                 Type: String
(5) ->

Compiling the above gives

\documentclass[11pt]{article}
\usepackage{amsmath}

\begin{document}
${{{li \left( {t} \right)} \  {\log \left( {t} \right)}} -t} \over {\log \left( {t} \right)}$
\end{document}

Not perfect either (since 'li should have been \li and made an operator) but it looks better that latex from sagemath,

Is this a known issue? Is there a workaround? editing these outputs by hand each time and fixing them it not practical for me.

Thank you --Nasser

sagemath 8.9.

I do not remember if I mentioned this before or not. I googled and did not find anything. If this is already mentioned and known issue, I am sorry and please feel free to close this.

Fricas returns li in one result, which gets translated log_integral by sagemath. But since in Latex, the _ is important , it looks bad when typeset. also, the it translation should be a math operator, as in \log_integral but now it just shows as log_integral.

Here is an example.

sage: var('t')
t
sage: result=integrate(1/log(t)^2,t, algorithm="fricas")
sage: result
(log(t)*log_integral(t) - t)/log(t)
sage: latex(result)
\frac{\log\left(t\right) log_integral\left(t\right) - t}{\log\left(t\right)}

When compiling the above latex, it shows as

\documentclass[11pt]{article}
\usepackage{amsmath}

\begin{document}
$\frac{\log\left(t\right) log_integral\left(t\right) - t}{\log\left(t\right)}$
\end{document}

Using Fricas directly

(3) -> result:=integrate(1/log(t)^2,t)

        li(t)log(t) - t
   (3)  ---------------
             log(t)
                                         Type: Union(Expression(Integer),...)
(4) -> latex(result)                  

   (4)
  "{{{li \left( {t} \right)} \  {\log \left( {t} \right)}} -t} \over {\log \lef
  t( {t} \right)}"
                                                                 Type: String
(5) ->

Compiling the above gives

\documentclass[11pt]{article}
\usepackage{amsmath}

\begin{document}
${{{li \left( {t} \right)} \  {\log \left( {t} \right)}} -t} \over {\log \left( {t} \right)}$
\end{document}

Not perfect either (since 'li should have been \li and made an operator) but it looks better that latex from sagemath,

Is this a known issue? Is there a workaround? editing these outputs by hand each time and fixing them it not practical for me.

Thank you --Nasser

sagemath 8.9.

I do not remember if I mentioned this before or not. I googled and did not find anything. If this is already mentioned and known issue, I am sorry and please feel free to close this.

Fricas returns li in one result, which gets translated log_integral by sagemath. Which is OK. But the latex translation still uses log_integral.

since in Latex, the _ is important , it looks bad when typeset. also,

I asked about this in the tex forum, and they say that using underscore in math names is not recommended.

So I think the translation of log_integral to latex should be a math operator, as in \log_integral but now changed to li. In non-latex, it just shows as is ok to use log_integral. .

Here is an example.

sage: var('t')
t
sage: result=integrate(1/log(t)^2,t, algorithm="fricas")
sage: result
(log(t)*log_integral(t) - t)/log(t)
sage: latex(result)
\frac{\log\left(t\right) log_integral\left(t\right) - t}{\log\left(t\right)}

When compiling the above latex, it shows as

\documentclass[11pt]{article}
\usepackage{amsmath}

\begin{document}
$\frac{\log\left(t\right) log_integral\left(t\right) - t}{\log\left(t\right)}$
\end{document}

Using Fricas directly

(3) -> result:=integrate(1/log(t)^2,t)

        li(t)log(t) - t
   (3)  ---------------
             log(t)
                                         Type: Union(Expression(Integer),...)
(4) -> latex(result)                  

   (4)
  "{{{li \left( {t} \right)} \  {\log \left( {t} \right)}} -t} \over {\log \lef
  t( {t} \right)}"
                                                                 Type: String
(5) ->

Compiling the above gives

\documentclass[11pt]{article}
\usepackage{amsmath}

\begin{document}
${{{li \left( {t} \right)} \  {\log \left( {t} \right)}} -t} \over {\log \left( {t} \right)}$
\end{document}

Not perfect either (since 'li should have been \li and made an operator) but it looks better that latex from sagemath,

Is this a known issue? Is there a workaround? editing these outputs by hand each time and fixing them it not practical for me.

Thank you --Nasser

sagemath 8.9.

I do not remember if I mentioned this before or not. I googled and did not find anything. If this is already mentioned and known issue, I am sorry and please feel free to close this.

Fricas returns li in one result, which gets translated log_integral by sagemath. Which is OK. But the latex translation still uses log_integral.

since in Latex, the _ is important , it looks bad when typeset.

I asked about this in the tex forum, and they say that using underscore in math names is not recommended.

So I think the translation of log_integral to latex should be changed to li\li or \logintegral. Then one can always make it a math operator using \DeclareMathOperator{\li}{log\_integral} but one can't do this, if the math name itself has _ in it. Latex gives an error.

In non-latex, it is ok to use log_integral.

Here is an example.

sage: var('t')
t
sage: result=integrate(1/log(t)^2,t, algorithm="fricas")
sage: result
(log(t)*log_integral(t) - t)/log(t)
sage: latex(result)
\frac{\log\left(t\right) log_integral\left(t\right) - t}{\log\left(t\right)}

When compiling the above latex, it shows as

\documentclass[11pt]{article}
\usepackage{amsmath}

\begin{document}
$\frac{\log\left(t\right) log_integral\left(t\right) - t}{\log\left(t\right)}$
\end{document}

Using Fricas directly

(3) -> result:=integrate(1/log(t)^2,t)

        li(t)log(t) - t
   (3)  ---------------
             log(t)
                                         Type: Union(Expression(Integer),...)
(4) -> latex(result)                  

   (4)
  "{{{li \left( {t} \right)} \  {\log \left( {t} \right)}} -t} \over {\log \lef
  t( {t} \right)}"
                                                                 Type: String
(5) ->

Compiling the above gives

\documentclass[11pt]{article}
\usepackage{amsmath}

\begin{document}
${{{li \left( {t} \right)} \  {\log \left( {t} \right)}} -t} \over {\log \left( {t} \right)}$
\end{document}

Not perfect either (since 'li should have been \li and made an operator) but it looks better that latex from sagemath,

Is this a known issue? Is there a workaround?

Thank you --Nasser