How can I have a big sum symbol (or rather normal sized) within a align environment, but still have the limits not underneath the the symbol and on top, but to the side. So this is what I want:
If I use \textstyle, the sum symbol gets also small.
The same goes for integrals too, of course.
\sum\nolimits_{i \in B}? – Au101 Sep 28 '17 at 18:06