# Minkowski sum alternative notation

This is a LateX question on good notation.

The Minkowski sum of two polytopes is pretty neat. I'm working with a lot of them right now, and Minkowski sum of simplices, which write as stuff like:

$$\sum y_I \, \mathrm{ conv } \{e_i | i \in I \}$$

So my problem arises when I want to talk about the vector space freely generated by these objects, so I have formal sums and Minkowski sums which should absolutely not have the same notation. When I'm adding two polytopes it's all good as I can use '+' and '+^M' and is reasonably clear. For the sum symbol I tried to use the '^M' trick but looks bad (looks like M is one of the limits of the sum).

Any ideas? Anyone that had a similar problem? Thanks!

• \sum\nolimits^M? – Henning Makholm Jun 21 '17 at 9:12
• It still looks like a limit if you have stuff in the lower line. – PenasRaul Jun 21 '17 at 9:14