[texhax] Left-flushed equations

[Uwe Lueck]

Very generally: all that has been proposed so far uses TeX's basic 
$$...$$. To get flush-left equations -- by which Micha certainly 
doesn't mean equation numbers on the left, but he doesn't 
want centered equations! with $$...$$, you would have to typeset 
the formulas inside some \hbox{$\displaystyle...$\hss}. 

I would rather tend to use a version of a list environment 
-- so you can control the indent and the vertical spaces 
as \leftmargin (\leftmargini), \topsep, and \itemsep . 
Difference to usual list environments: The counter shouldn't 
be reset for each environment. So introduce a new LaTeX 
counter{myequation}, use \newenvironment using 
\list, \endlist, and \usecounter{myequation} and such that 
\end{...} stores the value of myequation and \begin{...}
uses it ... sorry, I am not at home and don't have a manual 
here, and must leave this PC instantly. Some trick should 
have the effect that \item does $\displaystyle etc.

HTH -- Uwe. 


Micha Hofri <hofri at WPI.EDU> schrieb am 18.05.2006 16:04:53:
> 
> 
> Thanks to all who responded.  What actually happens is -- nothing.
> 
> I tried some of the medicine in Herbert's very welcome Math mode paper; I 
> tried Barbara's straightforward redefinition, there is simply no effect.
> 
> I look at the way the fleqn.clo file, which \usepackage{fleqn} loads, 
> redefines the environment equation (the only one I use here) and it makes 
> no direct use of these.
> In fact, the only reference to vertical motion there that I can 
> see is just before displaying the equation, there is a \leavevmode
> 
> Could this choice be the source of my difficulty?  Those left-flushed 
> equations look just right...
> 
> --Micha Hofri
> 
> 
> At 08:53 on 05/18/06 Barbara Beeton sent:
> 
> :     Now a related question: how do I control spacing above and below displays 
> :     (I need to reduce it drastically)?
> : 
> :     Do I need to modify the given rubber length parameters /and/ the relevant 
> :     penalties (and I am not yet sure which those be)?
> : 
> : you said you're using class amsart.
> : 
> : in this class there is the following definition:
> : 
> : \def\@adjustvertspacing{%
> :   \bigskipamount.7\baselineskip plus.7\baselineskip
> :   \medskipamount\bigskipamount \divide\medskipamount\tw@
> :   \smallskipamount\medskipamount \divide\smallskipamount\tw@
> :   \abovedisplayskip\medskipamount
> :   \belowdisplayskip \abovedisplayskip
> :   \abovedisplayshortskip\abovedisplayskip
> :   \advance\abovedisplayshortskip-1\abovedisplayskip
> :   \belowdisplayshortskip\abovedisplayshortskip
> :   \advance\belowdisplayshortskip 1\smallskipamount
> :   \jot\baselineskip \divide\jot 4 \relax
> : }
> : 
> : the various "displayskip"s govern the spacing
> : above and below displays.  you want to redefine
> : them.  you might try this (note the \makeat...
> : commands needed since there is an @ in the name):
> : 
> : \makeatletter
> : \def\@adjustvertspacing{%
> :   \bigskipamount.7\baselineskip plus.7\baselineskip
> :   \medskipamount\bigskipamount \divide\medskipamount\tw@
> :   \smallskipamount\medskipamount \divide\smallskipamount\tw@
> :   \abovedisplayskip\smallskipamount  %%% cut in half
> :   \belowdisplayskip \abovedisplayskip
> :   \abovedisplayshortskip\abovedisplayskip
> :   \advance\abovedisplayshortskip-1\abovedisplayskip
> :   \belowdisplayshortskip\abovedisplayshortskip
> :   \advance\belowdisplayshortskip 1\smallskipamount
> :   \jot\baselineskip \divide\jot 4 \relax
> : }
> : \makeatother
> : 
> : with 10pt type on 12pt baselines, \bigskipamount will
> : be about 8.5pt.  \medskipamount is half that (4.2pt)
> : and \smallskipamount half again (2.1pt).  there will
> : be an equal amount of stretch -- which is often the
> : only way to achieve a vertically justified page.
> : 
> : if you want to get rid of the stretch (this will have
> : possibly unpleasant consequences elsewhere, e.g. between
> : paragraphs and before (sub)section headings), you can
> : set the displayskips to be a fixed value, such as
> :   \abovedisplayskip 2pt \relax
> : the \relax is needed to keep tex from looking ahead
> : for a stretch value, which is assumed for every skip.
> : 							-- bb
> : 
> _______________________________________________
> TeX FAQ: http://www.tex.ac.uk/faq
> Mailing list archives: http://tug.org/pipermail/texhax/
> More links: http://tug.org/begin.html
> 
> Automated subscription management: http://tug.org/mailman/listinfo/texhax
> Human mailing list managers: postmaster at tug.org