Proper form of the "dx"[]
I thought the proper form was to distinguish it somehow from the product of two variables named "d" and "x". One way to do this is with \mathrm{d}x instead of dx. With that in mind, I boldly went ahead and changed the article. Revert if I overstepped!—GraemeMcRaetalk 21:23, September 30, 2010 (UTC)
\operatorname{d}\! instead of \,\mathrm{d}[]
It would be better to use \operatorname{d}\!x
(e.g. ) instead of \,\mathrm{d}
(e.g. ), because \operatorname
already inserts a space before the "d", and originates from [1]