Re: Position of prime for derivatives

[Mathias Schickel <msch@fa.uni-tuebingen.de>]

> Am 25.05.2017 um 18:59 schrieb Mikael P. Sundqvist <mickep@gmail.com>:
> 
> On Tue, May 23, 2017 at 5:02 PM, Mikael P. Sundqvist <mickep@gmail.com> wrote:
>> On Tue, May 23, 2017 at 11:58 AM, Mathias Schickel
>> <msch@fa.uni-tuebingen.de> wrote:
>>> Hi Mikael and Otared,
>>> 
>>> I can confirm issues regarding primes, too. If you are using the STIX 2
>>> fonts (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 <otared@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 <mickep@gmail.com> wrote:
>>> 
>>> On Sun, May 21, 2017 at 10:29 PM, Otared Kavian <otared@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 <mickep@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!
>>> 
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>>> 
>>> 
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>>> 
>>> 
>>> 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>___________________________________________________________________________________
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>>> the Wiki!
>>> 
>>> maillist : ntg-context@ntg.nl /
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>>> 
>>> 
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>>> the Wiki!
>>> 
>>> maillist : ntg-context@ntg.nl /
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>>> 
>>> 
>>> 
>>> ___________________________________________________________________________________
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>>> the Wiki!
>>> 
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>>> ___________________________________________________________________________________
>> 
>> Thanks Otared and Mathias!
>> 
>> Hans, just to know, are you working on a fix? Is there anything more
>> we can provide?
>> 
>> Best regards, Mikael
> 
> In
> 
> current version: 2017.05.25 12:50
> 
> all problems I've noticed with primes seem to be gone! Now we can even
> write $u''_p$ or $u_p''$.
> 
> Hans, your work and quick fix of this problem is very much appreciated!
> 
> Best regards, Mikael


Hi Mikael and Hans,

I can confirm that, too: Everything is working very well in the current ConTeXt version.
Thank you very much, Hans, for quietly solving all reported issues regarding primes!

Best regards
Mathias


> ___________________________________________________________________________________
> 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
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> 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
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