# [l2h] alignmentproblem eqnarray - amsmath - test-case

Ross Moore ross at ics.mq.edu.au
Wed Dec 31 01:03:11 CET 2003

Hi Peter,

On Tue, 30 Dec 2003, Peter Morling wrote:

> Dear Ross,
>
> here is a testcase of the problems.

Thanks for these.
Now I see what is the problem:
where to put the extra white-space, of undetermined amount.
(In TeX this is done using \hfill.)

>
> 1. first with AMSMATH
>
>
> 2. without AMSMATH
>

The reason that these are different when there is no numbering,
is that #2 uses a single image, which is then centered.

non-AMSMATH creates what I call 'novice'-mode mathematics HTML.
That is, very little mathematics is expected in the document,
so whatever there is causes a single large image to be generated,

with AMSMATH it is expected that more mathematics will occur,
and with greater use of alignments --- 'professional'-mode.
Here alignments are parsed, and images made of the cells.

'expert'-mode takes the parsing even further:
cell contents are parsed, making images only when needed
to construct something complicated; e.g. fractions, \sqrt{...},
special symbols, etc.
This usually results in many more but smaller images, which are
reused throughout the HTML of the document.
(It requires command-line switches, or an init-file setting
to get 'expert'-mode mathematics to be generated.)

Note that expert-mode is a prelude to generating MathML coding
for mathematical expressions. It has long been an aim of mine
to develop a MathML module for use with LaTeX2HTML.

After a bit of experimentation, I can now see how to get the
'proper' centering. The HTML needs to have:
<td width=50% .....>
^^^^^^^^^^
for the left and right cells of the mathematics in the alignment
<TABLE>.  (The eqn-number cells remain as fixed-width.)

It should be quite easy to adjust the LaTeX2HTML coding to add these
extra width attributes.

You can expect another email soon, telling you the required edits;
It will take a bit longer before the repository is updated at
www.latex2html.org
as I'm planning to submit many more changes than just these.

>
>
> Best,
> Peter

Thanks for the examples, which clearly indicate the problem.

Happy New Year,

Ross Moore

>
>
>
>
> Programmer Peter Morling, University of Southern Denmark
> Department of Statistics, Sdr. Boulevard 23A, DK-5000 Odense C
> Phone (+45) 6550 3399
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