displaymath environment using $$

[jgm]

Using the following notation:

$$ math $$

to insert displaymath environments in latex is desirable. This is better
when more than one line of math is required, since we would otherwise need
a hanging initial $$math.

Using \begin{displaymath}\end{displaymath} is possible, but not as convenient.

The symbols $$ are very unlikely to mean "dollar dollar" when alone at the
beginning of a line.

Google Code Info:
Issue #: 128
Author: nicolas...@gmail.com
Created On: 2009-02-17T17:01:32.000Z
Closed On: 2009-02-26T14:57:45.000Z

[jgm]

An alternative might be to use a single $, but line delimited to mean displaymath,
since the usual use of $ pairs is for inline math. Maybe we should consider if:

$
math
$

is unambiguous, since arguably, this could only mean display math, and could be
replaced with:

$math$

if inline math is desired. This is quite nice, since anything between $ pairs is
rendered as math one way or another.

Google Code Info:
Author: nicolas...@gmail.com
Created On: 2009-02-17T17:05:07.000Z

[jgm]

Your original suggestion—having Pandoc recognize math between $$s—is better, since
it's consistent with what LaTeX does. There was consensus (I think) to make Pandoc
recognize them, see: http://groups.google.com/group/pandoc-discuss/msg/81d711015d3ddd0c
but it seems to have not been implemented yet.

Google Code Info:
Author: shreevat...@gmail.com
Created On: 2009-02-21T23:35:42.000Z

[jgm]

Actually, it is already implemented in the SVN repository -- isn't it?
What version were you (nicholas.wu) testing with?

% pandoc -w latex
$$
\pi^2
$$
^D
[
\pi^2
]

Google Code Info:
Author: fiddloso...@gmail.com
Created On: 2009-02-26T06:48:07.000Z

[jgm]

I'm using the latest stable (1.1) version. I haven't looked at the svn version.

The output of that command in 1.1 is:

pandoc -w latex
$$
\pi^2
$$
$$ \pi^{}2 $$

it looks like the $$ are turning into $$, rather than
\begin{displaymath} \end{displaymath}.
If I do the following:

pandoc -w latex
$$\pi^2$$
[\pi^2]

then the displaymath is generated properly (using [ ] notation), but
obviously, there is no carriage return after the first $$, so this is
a different example.

Google Code Info:
Author: nicolas...@gmail.com
Created On: 2009-02-26T10:07:22.000Z

[jgm]

OK, then, this problem is already fixed in SVN, so I'm closing this bug.
I plan to release 1.2 pretty soon.

Google Code Info:
Author: fiddloso...@gmail.com
Created On: 2009-02-26T14:57:45.000Z

[sowiso]

We're on pandoc version 1.12.3.1. using the command
pandoc -f html+tex_math_dollars+tex_math_single_backslash -t latex

and find that displaymath between double dollars is not parsed correctly; the last dollar is escaped, as
$$math$$ becomes $$math$$

Is this a bug, or do we misuse something?

[jgm]

It is a bug in pandoc's HTML reader. Pandoc is parsing this as

[Plain [Math InlineMath "$math",Str "$"]]

instead of

[Plain [Math DisplayMath "math"]]

Commit 6c59f06 should fix this.

+++ max cohen [Jan 20 14 05:26 ]:

We're on pandoc version 1.12.3.1. using the command
pandoc -f html+tex_math_dollars+tex_math_single_backslash -t latex

and find that displaymath between double dollars is not parsed
correctly; the last dollar is escaped, as
$$math$$ becomes $$math$$

Is this a bug, or do we misuse something?

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References

1. displaymath environment using $$ #225 (comment)

[allefeld]

Using

$$
math
$$

for display math is not explicitly documented in the manual. It can be inferred from

It will appear verbatim surrounded by (...) (for inline math) or [...] (for display math).

in the Math section, but I think writing this explicitly would be better.

[jgm]

I'll add something to the manual.