[texhax] derivatives and integrals: math operators
Reinhard Kotucha
reinhard.kotucha at web.de
Thu Aug 6 22:20:00 CEST 2009
On 6 August 2009 Phil Parker wrote:
> On 08/06/2009 at 03:58 PM, Nat?rcia Fernandes <natercia at eq.uc.pt> wrote:
>>Math operators should be typeset in upright letters and also have
>>a special spacing. So shouldn't the "d" of derivatives (or
>>integrals) be set with upright letters, since both are
>>mathematical operators?
>
> Neither is a mathematical operator as far as mathematicians are
> concerned, and we also don't set all operators upright -- only
> certain ones.
Hmm. I always thought that everything except variables is written
upright. There might be different conventions, but are there any
rules? There was a similar discussion a few years ago. I don't
remember the details, but I remember that someone told me that he has
a book published in 18?? in the UK with "d" typeset upright.
> The convention you mention is one adopted by some physicists,
> engineers, and other users of "applied" mathematics for reasons
> with which most (if not all) "pure" mathematicians either just do
> not agree or regard as plain wrong.
What are the reasons and what are the exceptions you mentioned above?
Regards,
Reinhard
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