Am Sun, 30 Nov 2025 10:50:08 +0100
schrieb Patrick Dupre <[email protected]>:

> > Sent: Sunday, November 30, 2025 at 10:11 AM
> > From: "Kornel Benko" <[email protected]>
> > To: [email protected]
> > Subject: Re: issue with replace
> >
> > Am Sat, 29 Nov 2025 22:39:27 +0100
> > schrieb Patrick Dupre via lyx-users <[email protected]>:
> >   
> > > Hello,
> > > 
> > > In the attached file, if I do a find and replace on \Delta_{ul}, by
> > > \delta_{ul} (see the png file), lyx does not replace \Delta_{ul}, but
> > > \Delta_{ul}^2 by \delta_{ul} which is a real problem.
> > > 
> > > Best.
> > > 
> > > ===========================================================================
> > >  Patrick DUPRÉ                                 | | email: [email protected]
> > > ===========================================================================
> > >   
> > 
> > Except that in the buffer is
> > 
> > \Delta{^2}_{ul}  
> 
> What do you mean?
> I disagree
> 
> In preview mode (and in the lyx file)
> \[
> \frac{\Gamma_{ul}^{2}+\Delta_{ul}^{2}}{2\Gamma_{ul}}
> \]
> and in preview search
> $\Delta_{ul}$
> 
> Thus, I anticipate that \Delta_{ul} will be changed by \delta_{ul}
> 
> > 
> > so the search for \Delta_{ul} fails. How did you insert "\Delta_{ul}^2" ?  
> 
> Not sure to understand
> Usually I do it manually. Note that lyx inserted \Delta_{ul}^{2}

Not here. I see
\[
\frac{\Gamma^{2}_{ul}}{2\Gamma_{ul}}
\]

Again: What is your lyx-version?

        Kornel

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