On Thu, Mar 5, 2020 at 6:34 PM Hans Hagen= <j.hagen@xs4all.nl> wrote:<= br>

On 3/5/2020 5:41 PM, Mikael P. Sundqvist wrote:
> On Thu, Mar 5, 2020 at 5:36 PM Aditya Mahajan <adityam@umich.edu
> <mailto:adit= yam@umich.edu>> wrote:
>
>=C2=A0 =C2=A0 =C2=A0On Thu, 5 Mar 2020, Hans Hagen wrote:
>
>=C2=A0 =C2=A0 =C2=A0 > On 3/4/2020 11:44 PM, Weber, Matthias wrote:<= br> >=C2=A0 =C2=A0 =C2=A0 >> Dear List,
>=C2=A0 =C2=A0 =C2=A0 >>
>=C2=A0 =C2=A0 =C2=A0 >> \starttext
>=C2=A0 =C2=A0 =C2=A0 >> \startformula
>=C2=A0 =C2=A0 =C2=A0 >> \left(f\right)'' =3D f''<= br> >=C2=A0 =C2=A0 =C2=A0 >> \stopformula
>=C2=A0 =C2=A0 =C2=A0 >> \stoptext
>=C2=A0 =C2=A0 =C2=A0 >>
>=C2=A0 =C2=A0 =C2=A0 >> has the second apostrophe set too low. Th= is is in MKIV on
>=C2=A0 =C2=A0 =C2=A0ConTeXt live as
>=C2=A0 =C2=A0 =C2=A0 > well as in my slightly older version.
>=C2=A0 =C2=A0 =C2=A0 >> What is the =E2=80=9Cright=E2=80=9D way t= o typeset a second derivative?
>=C2=A0 =C2=A0 =C2=A0 > you have to turn on
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 > \setupmathematics
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0[collapsing=3D3]
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 > but it has the side effect of also collapsing= more:
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 > $x'' >=3D 10$
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 > (which is why the mechanism is currently turn= ed off by default)
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 > i'll think about an option that only does= some specific ones only
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 > (btw, i love tex but these primes are a bit p= ainful due to th
>=C2=A0 =C2=A0 =C2=A0eorriginal
>=C2=A0 =C2=A0 =C2=A0 > approach which has lead mixtures of (1) raise= d in the font and/or
>=C2=A0 =C2=A0 =C2=A0raised
>=C2=A0 =C2=A0 =C2=A0 > in the engine, (2) them being superscripts bu= t not really, (3) fonts
>=C2=A0 =C2=A0 =C2=A0 > therefore doing it inconsistently, (4) some p= arsing related to
>=C2=A0 =C2=A0 =C2=A0multiple
>=C2=A0 =C2=A0 =C2=A0 > scripts, (5) double, tripple, etc primes bein= g real unicode
>=C2=A0 =C2=A0 =C2=A0characters
>=C2=A0 =C2=A0 =C2=A0 > but spaced singles in traditional tex (which = itself then
>=C2=A0 =C2=A0 =C2=A0introduces some
>=C2=A0 =C2=A0 =C2=A0 > size juggling) ... i could proabbly write a f= ew pages about it)
>
>=C2=A0 =C2=A0 =C2=A0So what's the best way to input them: using \pr= ime, \prime\prime, etc.?
>
>=C2=A0 =C2=A0 =C2=A0Aditya_____________________________________________= ______________________________________
>=C2=A0 =C2=A0 =C2=A0If your question is of interest to others as well, = please add an
>=C2=A0 =C2=A0 =C2=A0entry to the Wiki!
>
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>
>
> And what is the way if one also want indices:
>
> $f''_{xx}$ or $f_{xx}''$ or ... ?
>
> I want the indices under the primes

did you try with

\setupmathematics
=C2=A0 =C2=A0[collapsing=3D1]

both work but (i'm no mathematician) i'd opt for

$f_{xx}''$

as it says take the second something from f_{whatever} unless of course the index applies the second something

But i bet that Aditya can give the real answer.

Hans

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Oh, I had not. It looks better with collapsing= =3D1, indeed. A few neq questions comes to me:

Doe= s ConTeXt not use the same prime character as in TeX/LaTeX? Or has somethin= g changed in latin modern? See the attached pdf files (derivatives.pdf from= ConTeXt and primetime-crop.pdf from lualatex). The prime character looks m= ore slanted in ConTeXt. It also almost looks like it is cut horizontally at= the bottom of the character. Also, the space between the two x in the subs= cript looks a bit large to me. Is that easily tuned?

/Mikael

The ConTeXt file:

\starttext<= br>\startTEXpage[offset=3D1bp]
\setupmathematics[collapsing=3D1]
$f_{= xx}''$
\stopTEXpage
\stoptext

Th= e LaTeX file:

\documentclass{article}
\usepackage{lmodern}
= \pagestyle{empty}
\begin{document}
$f_{xx}''$
\end{docume= nt}