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OK, so this is a follow-up to one of my previous questions:

If you uncomment the \lineskiplimit line, LaTeX goes crazy. Why? Does anyone have an idea how to fix it (without manually changing \lineskiplimit temporarily, or hacking into amsmath, which seems a bit nightmare-ish)?



A sample aligned equation:
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up vote 6 down vote accepted

Here you find one of the reasons: amsmath.sty says

    \global\dt@ptrue \spread@equation
                \penalty\@eqpen \global\dspbrk@lvl\m@ne

and this of course has quite a bizarre consequence:

Overfull \vbox (15864.60002pt too high) has occurred while \output is active

It's not a good idea to set \lineskiplimit=-\maxdimen except in very controlled situations such as tabulars where struts can be inserted (and are, actually).

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Thanks, but what sense does it make to \vskip -\lineskiplimit and then \normallineskiplimit!? – mbork Mar 24 '12 at 22:15
OK, I guess I understand: the second one may get discarded, and we might want exactly this. So what should I do if I actually want a negative \lineskiplimit in my document? Any idea? – mbork Mar 24 '12 at 22:18
OK, so I asked this in a separate question. – mbork Mar 24 '12 at 22:34
Link to the new question – 黄雨伞 Feb 6 '15 at 15:27

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