Hi Mikael and Otared,
I can confirm issues regarding primes, too. If you are using the STIX 2 fonts
(http://www.stixfonts.org <http://www.stixfonts.org/>) and my example below you
get a somewhat strange behaviour of primes that is pretty obvious. I think the
issues should be fixed.
By the way the issue seems to depend to some extend on the fonts. Using Lucida
by \setupbodyfont[lucidaot] it is not that obvious but still present. Using
Latin Modern it seems that the spacing between the primes changes between f''
and f^{''}. Cambria seems to show that behaviour (like Latin Modern), too, but
less obvious.
Best regards
Mathias
%% example
\unprotect
\definefontfeature
[stixtwo-math-feature]
[kern=yes,
ss01=no, % calligraphic letters
ss02=yes, % lowercase italic variants (e.g. open g)
ss03=no, % hbar und lambdabar variants
ss04=yes, % larger and lower primes, minute etc.
ss05=no, % shorter arrows
ss06=no, % narrower and shorter element and similar
symbols
ss07=no, % some smaller operators and emptyset variant
ss08=yes, % upright integrals etc.
ss09=no, % variant negated symbols
ss10=yes, % variants of greater and lesser and similar
symbols
ss11=yes, % variant of negated set (inclusion etc.)
symbols
ss14=yes, %
ss16=yes] % variants of circled operators
\starttypescriptcollection[Stix2]
\starttypescript [\s!serif] [Stix2] [\s!all]
\definefontsynonym
[Stix2Regular]
[file:STIX2Text-Regular.otf]
\definefontsynonym
[Stix2Bold]
[file:STIX2Text-Bold.otf]
\definefontsynonym
[Stix2Italic]
[file:STIX2Text-Italic.otf]
\definefontsynonym
[Stix2BoldItalic]
[file:STIX2Text-BoldItalic.otf]
\definefontsynonym[\s!Serif] [Stix2Regular] [\s!features=\s!default]
\definefontsynonym[\s!SerifBold] [Stix2Bold] [\s!features=\s!default]
\definefontsynonym[\s!SerifItalic] [Stix2Italic]
[\s!features=\s!default]
\definefontsynonym[\s!SerifBoldItalic] [Stix2BoldItalic]
[\s!features=\s!default]
\stoptypescript
\starttypescript [\s!math] [Stix2]
\definefontsynonym
[Stix2Math]
[file:STIX2Math.otf]
[features=math\mathsizesuffix]
\definefontsynonym [\s!MathRoman] [Stix2Math]
[\s!features={\s!math\mathsizesuffix,mathextra,stixtwo-math-feature},\s!designsize=\s!auto]
\stoptypescript
\starttypescript [Stix2]
\definetypeface [\typescriptone] [\s!rm] [\s!serif] [Stix2] [\s!default]
\definetypeface [\typescriptone] [\s!mm] [\s!math] [Stix2] [\s!default]
\stoptypescript
\stoptypescriptcollection
\protect
\setupbodyfont[Stix2]
\starttext
%
Compare $f'$ to $(f')$ and to $f''$, $(f'')$, $f^{''}$ and $(f^{''})$.
%
\stoptext
%% end of example
> Am 22.05.2017 um 09:50 schrieb Otared Kavian <ota...@gmail.com>:
>
> Hi Mikael,
>
> You are correct, the position of \prime depends on whether there is a next
> character or not after it, and it seems that this has an effect on its
> position for characters having a subscript as in
> $f_{1}''(x) \neq f''_{1}(x)$
> $f'f''f'’'$
> Best regards: OK
>
>> On 22 May 2017, at 08:51, Mikael P. Sundqvist <mic...@gmail.com> wrote:
>>
>> On Sun, May 21, 2017 at 10:29 PM, Otared Kavian <ota...@gmail.com> wrote:
>>> Hi Mikael,
>>>
>>> I agree with what you are reporting: the current behavior of the \prime
>>> operator is not completely satisfying when using ConTeXt mkiv, while in
>>> mkii it is the most satisfying (in my opinion…).
>>>
>>> The turn around consisting in using $f^{‘’}$ or $f^{\prime\prime}$, or
>>> even $f^{{}^{\prime\prime}}$, is not really satisfying either.
>>>
>>> But I think (or I hope that) at some point Hans will fix it in mkiv.
>>>
>>> Best regards: OK
>>>
>>>> On 21 May 2017, at 08:14, Mikael P. Sundqvist <mic...@gmail.com> wrote:
>>>> […]
>>>>
>>>> And just for reference, the document below gives the attached pdf,
>>>> compiled with lualatex. I think the location of the primes there look
>>>> better. Sorry for spamming about this issue, but I think it is
>>>> important for all people writing math with ConTeXt.
>>>>
>>>> /Mikael
>>>>
>>>> \RequirePackage{luatex85}
>>>> \documentclass[border=2pt]{standalone}
>>>>
>>>> \usepackage{unicode-math}
>>>> \setmainfont{LucidaBrightOT}
>>>> \setmathfont{LucidaBrightMathOT}
>>>>
>>>> \begin{document}
>>>> $f'f''$
>>>> \end{document}
>>>> <lltest.pdf>___________________________________________________________________________________
>>>> If your question is of interest to others as well, please add an entry to
>>>> the Wiki!
>>>>
>>>> maillist : ntg-context@ntg.nl /
>>>> http://www.ntg.nl/mailman/listinfo/ntg-context
>>>> webpage : http://www.pragma-ade.nl / http://context.aanhet.net
>>>> archive : https://bitbucket.org/phg/context-mirror/commits/
>>>> wiki : http://contextgarden.net
>>>> ___________________________________________________________________________________
>>>
>>> ___________________________________________________________________________________
>>> If your question is of interest to others as well, please add an entry to
>>> the Wiki!
>>>
>>> maillist : ntg-context@ntg.nl /
>>> http://www.ntg.nl/mailman/listinfo/ntg-context
>>> webpage : http://www.pragma-ade.nl / http://context.aanhet.net
>>> archive : https://bitbucket.org/phg/context-mirror/commits/
>>> wiki : http://contextgarden.net
>>> ___________________________________________________________________________________
>>
>> Otared, thank you for confirmation. I also hope there will be a fix soon.
>>
>> In the meantime, I put yet another test file. The location of the
>> primes depends on the next character (I use, at the moment current
>> version: 2017.05.15 21:48)
>>
>> /Mikael
>>
>> \definefontfamily[myface][rm][Lucida Bright OT]
>> \definefontfamily[myface][mm][Lucida Bright Math OT]
>> \setupbodyfont[myface,10pt]
>> \starttext
>> \startTEXpage[offset=2pt]
>> $f'(x)f''(x)f'f''$
>> \stopTEXpage
>> \stoptext
>> <primfisk.pdf>___________________________________________________________________________________
>> If your question is of interest to others as well, please add an entry to
>> the Wiki!
>>
>> maillist : ntg-context@ntg.nl /
>> http://www.ntg.nl/mailman/listinfo/ntg-context
>> webpage : http://www.pragma-ade.nl / http://context.aanhet.net
>> archive : https://bitbucket.org/phg/context-mirror/commits/
>> wiki : http://contextgarden.net
>> ___________________________________________________________________________________
>
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the
> Wiki!
>
> maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage : http://www.pragma-ade.nl / http://context.aanhet.net
> archive : https://bitbucket.org/phg/context-mirror/commits/
> wiki : http://contextgarden.net
> ___________________________________________________________________________________
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the
Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage : http://www.pragma-ade.nl / http://context.aanhet.net
archive : https://bitbucket.org/phg/context-mirror/commits/
wiki : http://contextgarden.net
___________________________________________________________________________________
