OK, so my log files indicated that mathjax-2.6.1 had been successfully 
installed, but upon looking at what should have been installed it was clear 
that the install was not correct.

After

   ./sage -f mathjax

and rebuilding the html-docs the math (latex) typsetting is now what it 
should be. Apparently, this has been this way for some time? Perhaps 
someone else can get some mileage from this.

On Monday, January 8, 2018 at 11:33:04 AM UTC-6, Steven Trogdon wrote:
>
> The html code for plot.html appears to be correct. In places where `(0,1)` 
> is typeset there is <span class="math">\((0,1)\)</span>. However at the 
> beginning of plot.html there is
>
>     <script type="text/javascript" src="../../_static/jquery.js"></script>
>     <script type="text/javascript" 
> src="../../_static/underscore.js"></script>
>     <script type="text/javascript" 
> src="../../_static/doctools.js"></script>
>     <script type="text/javascript" 
> src="../../_static/MathJax.js?config=TeX-AMS_HTML-full,../mathjax_sage.js"></script>
>     <script type="text/javascript" 
> src="../../_static/MathJax.js?config=TeX-AMS_HTML-full,../mathjax_sage.js"></script>
>     <link rel="shortcut icon" href="../../_static/favicon.ico"/>
>     <link rel="index" title="Index" href="../../../genindex.html" />
>     <link rel="search" title="Search" href="../../../search.html" />
>     <link rel="next" title="Text in plots" href="text.html" />
>     <link rel="prev" title="2D Graphics" href="../../index.html" />
>     <link rel="icon" href="../../_static/sageicon.png" type="image/x-icon" 
> />
>     <script src="../../_static/thebe.js" type="text/javascript"></script>
>     <script src="../../_static/thebe-sage.js" 
> type="text/javascript"></script>
>
> All links are good except
>     <script type="text/javascript" 
> src="../../_static/MathJax.js?config=TeX-AMS_HTML-full,../mathjax_sage.js"></script>
>
> which is stale (file not found). So the MathJax stuff is not being loaded? 
> So what could be causing this?
>
>
> On Sunday, January 7, 2018 at 11:52:41 PM UTC-6, Steven Trogdon wrote:
>>
>> This appears to be since version 8.1. In src/sage/plot/plot.py there is
>>
>>     .. warning::
>>
>>         If ``plotjoined`` is ``False`` then the axis that is in log scale
>>         must have all points strictly positive. For instance, the 
>> following
>>         plot will show no points in the figure since the points in the
>>         horizontal axis starts from `(0,1)`. Further, matplotlib will 
>> display
>>         a user warning.
>>
>>         ::
>>
>> In the html docs, the `(0,1)` now appears literally as \((0,1)\), i.e. no 
>> math typesetting.
>>
>

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