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[Vincent Belaïche]

Just for information, not trying to be controversial, I came acorss
package nchairx (New Chair 10), it has a \D operator to make an
*upright* d in the infinitesimal variation in an integral (see doc
(http://mirrors.ctan.org/macros/latex/contrib/nchairx/doc/chairxmath.pdf)
page 5.

  V.

Le mar. 10 août 2021 à 11:05, Vincent Belaïche
<vincent.belaiche at gmail.com> a écrit :
>
> Thank you for the review !
>
> Le lun. 9 août 2021 à 18:42, Hefferon, Jim S. <jhefferon at smcvt.edu> a écrit :
> >
> > I added a paragraph on the warning that you get if you use \small, etc., inside math.
> >
> > I also reverted the \textrm{d} x for the integral.  I am aware that a standards org said to use that, but I think the other is common practice also and I am following Knuth's practice, p 168.
>
> It was « \mathrm{d} », not « \textrm{d} ». AMS usergide says not to
> use \text… for operator names.
> I won't argue, it is a matter of taste, I was not aware that the other
> way was posible. The amsmath userguide (page 23) also uses a plain d.
> Actually for an upright d, amsmath « \operatorname{d} » would be
> better. Or something line « \DeclareMathOperator\infvar{d} », and then
> « \infvar x » instead of « dx ».
>    V.
> >
> > Jim
> >
> > ...........................................................
> > "You’ve got to see the floor before you build the ceiling."  -- D Knuth
> >