# Different \mathcal O

I would like to get a script O looking like this:

However, \mathcal O and \mathscr O give , which are slightly different.

This is not the pre-1992 \mathcal O.

-
Old versions of Computer Modern mathcal was available in old versions of Latin Modern, but the O looks nothing like the one you are showing (the changes were minor, see what happened to the F). Your O is more like a variant of mathscr so you could look at "English Script" fonts on a site like myfonts to see if you find something similar (for example, English 111 is a bit closer). From which book(s) does it come from ? – Philippe Goutet Dec 8 '11 at 6:00
Hartshorne's Algebraic Geometry uses it on page 69. It also appears in an old (pre-TeX) article (I'll try to upload a scan tomorrow) which also has a very exotic script A. – Yuri Delanghe Dec 8 '11 at 6:58
OK, that's the script used on monotype machines which you can see in the books about monotype technology (e.g. Chaundy's The Printing of Mathematics or Monotype's List of Mathematical Characters for 4-line mathematics). I'm not sure it's available as a digital font, though. I'll upload a scan later on for you to see. Fonts called Commercial Script come close, but it's not quite that yet. – Philippe Goutet Dec 8 '11 at 8:32
@YuriDelanghe This questions seems borderline for TeX.sx. As far as I can see, you want a particular font which we have no idea has ever been available as a TeX font. At the very least it would be useful to know the source of your graphic. – Joseph Wright Dec 8 '11 at 8:46
@JosephWright Yes, I hadn't realized that Hartshorne might be non-TeX. – Yuri Delanghe Dec 8 '11 at 18:14

\mathscr{O} from Euler package is thinner than the one from mathrsfs, which you obviously use:
\documentclass{standalone}
$\mathscr{O}$