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(First of all, I know that \[ \] should be used instead of $$ $$ and I do it.)

I'd like to know about the vertical spacing around math display blocks.

According to texdef -t latex \[ we have 

\[:
macro:->\relax \ifmmode \@badmath \else \ifvmode \nointerlineskip \makebox [.6\linewidth ]{}\fi $$\fi

and texdef -t latex \] returns

\]:
macro:->\relax \ifmmode \ifinner \@badmath \else $$\fi \else \@badmath \fi \ignorespaces

So I didn't see any command for vertical spacing.

Since the command $$ appears in the code above I tried also texdef -t tex $$ and texdef -t latex $$ with no success.

If I'm not wrong I remember something related with \abovedisplayskip or something similar.

Well, my question is: Are the vertical spaces above and below the command \[ \] the same as the ones inserted by \begin{equation}\end{equation} (and its stared versions)? How to check this reading the macros and codes?

Sigur
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  • this has been asked before, eg http://tex.stackexchange.com/questions/30909/abovedisplayskip-vs-abovedisplayshortskip or http://tex.stackexchange.com/questions/18180/uneven-display-skips/18183#18183 – David Carlisle Dec 04 '13 at 13:31
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    The short answer to your question is no, longer answer http://tex.stackexchange.com/questions/503/why-is-preferable-to/69854#69854 (and somewhere I have an answer with examples, but I don't see it now) – David Carlisle Dec 04 '13 at 13:37
  • OK, thanks David. Let's close the post, if necessary. – Sigur Dec 04 '13 at 13:40
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    Up to you, although all the links I posted were failed attempts to find an answer of mine that I'm sure is there somewhere (but perhaps it was on comp.text.tex last century, hard to be sure:-) – David Carlisle Dec 04 '13 at 13:44
  • I just voted to close this as the duplicate as suggested above. – Johannes_B Feb 08 '15 at 12:14

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