I did a search trying to find out how one can typeset multiple lines under a sum and found out that there is the possibility to use \atop
or \substack
together with a remark that one shouldn't use \atop
.
Is there any good reason for that? Does it commit some typographical sins I am not aware of?
Best Answer
Using
\atop
is abusing its functionality; if you want to turn a screw, sometimes a knife can help, but a screwdriver is surely better.In other words, use
\substack
that has been specifically defined for this task and can accommodate any number of lines. It's also easier to use even for two lines.The first is wrong; the second is complicated to write. With
\substack
you also avoid the warning