amssymb is a subset of amsfonts, and is only required when the font used
isn't otherwise defined as a math-capable font. So, it isn't surprising that
this is working fine when building to HTML... although I'm not as familiar
with the latex -> html process.
amsfonts/amssymb should most likely only be included when building to PDF is
my guess. If you reference symbol paths multiple times, latex gets unhappy.
I.e.,
\usepackage{amssymb}
\usepackage[T1]{fontenc}
\usepackage[bitstream-charter]{mathdesign}
will return an error, since then \leqslant, for instance, is defined twice.
On Thu, Jun 3, 2010 at 2:04 PM, Rob Beezer <[email protected]> wrote:
> Mitesh Patel discovered that the tex macro "\leqslant" (a slanted
> inequality) breaks the PDF reference manual, while it survives just
> fine in the HTML version. (Introduced at Trac #8030, which is merged,
> fixed at Trac #9102, awaiting review.) This symbol seems to be
> provided by the AMS packages amssymb and/or amsfonts. On my tex
> installation, both are provided in texmf-texlive/tex/latex/amsfonts/,
> so I think these are fairly standard packages to expect a user/
> developer to have.
>
> Limited poking around shows:
>
> (1) In doc/common/macros.tex, there is the line
>
> \usepackage{amsmath}
>
> but this file makes no mention of amssymb or amsfonts
>
>
> (2) In doc/common/conf.py (which looks Sphinx-specific?) there is the
> line
>
> latex_elements['preamble'] = '\usepackage{amsmath}\n
> \usepackage{amsfonts}\n'
>
> Questions:
>
> (a) Is the distinction conscious, or is this an omission of AMS
> symbols on the PDF side?
>
> (b) If in need of fixing, is macros.tex the place to add?
>
> (c) And if so, is amsfonts superior to amssymb, or vice versa (or
> both?)? I always have good luck with amssymb only. I would assume we
> want the same macros available for both HTML and PDF versions of the
> docs?
>
> Thanks for any history, input, advice.
>
> Rob
>
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