\[DifferentialD]
apparently does not have a Unicode representation, so I had to enter it directly in a reformatting of question 83672. However, I noticed that it is displayed in blue, as if it were an unknown variable. A minor issue, perhaps, but I think this should be fixed.
Addendum
In light of the comment by Histograms, I suggest that it would be better yet for Mathematica StackExchange to interpret and display this character rather than just inserting a blank (probably non-printing) character. The same is true of \[Distributed]
and, perhaps, other Mathematica characters.
\[DifferentialD]
has unicode U+F74C but I think it's in the private use area so there's no guarantee it will render properly without the right font. reference.wolfram.com/language/ref/character/DifferentialD.html – Histograms May 18 '15 at 11:31\[DifferentialD]
in Mathematica. It will not show the Mathematica glyph in a browser. – m_goldberg May 18 '15 at 15:32d
here. – bbgodfrey May 18 '15 at 20:15