[ho-tex] vertical spacing with amsmath+fleqn+hyperref

[Reinhard Kotucha]

On 2016-05-17 at 00:09:05 +0100, David Carlisle wrote:

 > On 17 May 2016 at 00:02, Reinhard Kotucha <reinhard.kotucha at web.de> wrote:
 > > On 2016-05-16 at 23:19:23 +0100, David Carlisle wrote:
 > >
 > >  > see
 > >  > http://tex.stackexchange.com/questions/309096/inconsistent-vertical-space-after-first-beginequation/309099#comment750929_309099
 > >  >
 > >  > for discussion of related issues
 > >
 > > There you say
 > >
 > >    Never leave a blank line before a displayed equation, or use two
 > >    consecutive equations. Use an environment for a multiline display
 > >    such as align or multline from amsmath Ð
 > >
 > > I disagree.  Paragraphs denote the logical structure of a document and
 > > it should be possible to insert these blank lines whenever
 > > appropriate.  If this isn't supported by LaTeX, it's a severe bug.
 > >
 > > Regards,
 > >   Reinhard
 > >
 > It's a feature of tex-the-program and pretty hard to work round,
 > starting a paragraph with display math simply is not possible in tex.
 > If you have a blank line before display math tex starts a paragraph
 > that just has indentation box and parfillskip glue then following that
 > white line has the abovedisplayshortskip, so the end result looks like
 > vertical space but most of it it isn't dropped at a page break as it
 > is an empty line of a paragraph not vertical space.
 > 
 > Not putting a blank line before a display is the only real alternative
 > on plain or latex any system that tried to work round this would b
 > emassively incompatible with existing documents.

Thank you very much, David, for the explanation.  I hope that my last
mail didn't sound too harsh.

Regards,
  Reinhard

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