I love the (unicode) Neo Euler font from Hermann Zapf & Khaled Hosny. The only caveat is the `\sum`

symbol, which is in my opinion just ugly:

I hear it also from other people, therefore I wonder if someone designed an alternative sum symbol for Neo Euler?

I am aware, that I could load this symbol from the other unicode math packages (Cambria, Asana, XITS, LM, Lucida, Latin Modern, TeX Gyre), but they don't look nice with Neo Euler.

## Best Answer

One possibility is to use my technique at How are big operators defined? to define

`\varsum`

, which takes the`\Sigma`

glyph from the same font family and scales it to the size of`\sum`

.This approach has the advantage of using a glyph already in that font family. However, you may find the weight too heavy is the downside.

Note that I don't have the neo Euler font, so I demonstrate below with the

`eulervm`

package. After showing the`\Sigma`

glyph on the first line, I then compare equations using`\sum`

and`\varsum`

in all math styles.And here is a version that takes the

`\Sigma`

glyph in`\scriptstyle`

by defining`\varsum`

asIt produces a wider result