Sign up ×
TeX - LaTeX Stack Exchange is a question and answer site for users of TeX, LaTeX, ConTeXt, and related typesetting systems. It's 100% free, no registration required.

I deal with a lot of double sums / double products. I would like to be able to massage TeX into producing something like this:

(that was made with the gimp) ... and a product in product symbol as well.

share|improve this question

2 Answers 2

up vote 6 down vote accepted

You can have a look at the section Joining and overlapping existing symbols in manual of Comprehensive Symbol List.




  \SUM A_i


enter image description here

share|improve this answer
excellent, thanks. – Owen Maresh Feb 19 '11 at 16:08

For what it is worth, Unicode defines


If you are able to use unicode-math (with XeLaTeX or LuaLaTeX) and appropriate math fonts, you can access that symbol with \mathbb{\sum}.

STIX/XITS Math gives stix double-struck sum and Cambria Math gives cambria double-struck sum.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.