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Dec 13, 2013 at 0:58 comment added Michael Hardy @LSpice : I understand the case for that usage; in particular, it allow the use of $d$ as a variable, so that one can write $\dfrac{\mathrm{d}f}{\mathrm{d}d}$, etc. However, the usage with the $d$ italicized as if it were a variable is standard although not universal.
Dec 12, 2013 at 23:20 comment added LSpice @MichaelHardy, if we're going to {\TeX}pick, then surely it should be something like ${\mathrm d}\zeta$ (rather than $d\zeta$), since the $\mathrm d$ is an operator (rather than a variable)?
Oct 3, 2010 at 14:11 history edited didest CC BY-SA 2.5
added 2 characters in body
Jul 8, 2010 at 15:19 comment added Michael Hardy Let's see if you TeX code can be improved: $$ f(z) := \int_0^z \exp(\zeta^2)\,d\zeta $$ (The backslash in \exp not only should prevent italicization but should also result in proper spacing in things like "a \exp b", and the space before d\zeta seems appropriate.)
May 9, 2010 at 18:40 history answered Daniel Asimov CC BY-SA 2.5