Thanks, Andrew: I may take a look at it.
-B Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10 ________________________________ From: [email protected] <[email protected]> on behalf of Andrew Parsloe <[email protected]> Sent: Tuesday, January 8, 2019 9:12:42 PM To: [email protected] Subject: Re: LyX & differential *operator* On 9/01/2019 3:28 AM, Bernt Lie wrote: > I use LyX 2.3.1 under Windows 10. > > I'm trying to create an "operator" for the infinitesimal d. Thus, instead of > writing $dx$ -- which leads to "d" in italic font, I go to > Document/Settings... and the LaTeX Preamble field: > > \DeclareMathOperator{\diff}{d} > > Next, in the document, I write $\diff x$, i.e., I type: \diff + space + x > when in math mode. The result is that "d" is typeset in roman font, which is > what I want. > > HOWEVER, the spacing between the roman d and the x is a little bit too large > to be pretty. > > OK -- I have tried to insert a negative space (\! + space) in the document, > and that helps. However, now the spacing is a little bit too small... > > * Question: is there a slightly smaller negative spacing? > > Also: how can I insert the negative space into the operator definition? Doing: > > \DeclareMathOperator{\diff}{\! d} > > doesn't work. > > Thanks! > -B For your interest, I recently uploaded version 3 of my diffcoeff package to CTAN. This provides a command \diff for writing differential coefficients (derivatives) with multiple options for tweaking the display, and a command \dl for writing differentials with an option for inserting a specified amount of space before the differential -- something you might want to do in an integral for instance to separate the integrand from the dx. Andrew --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus
