Den 18 maj 2017 10:13 fm skrev "Otared Kavian" <ota...@gmail.com>:
Hi Hans,
Thanks for your explanations.
When using constructions such as $f’’_2(x)$, I will adapt my input in
order to get what seems correct.
Best regards: OK
> On 17 May 2017, at 17:17, Hans Hagen <pra...@wxs.nl> wrote:
>
> On 5/17/2017 8:35 AM, Otared Kavian wrote:
>> Hi Hans,
>>
>> Thanks for having fixed the behavior of the prime in the latest beta
release (ConTeXt version 2017.05.15 21:48).
>> However, as you may see in the two attached PDF files, the result is
still incorrect when one types for example $f_2’’(x)$, which should give
the same result as $f’’_2(x)$.
>> The correct behaviour is that obtained with mkii. Indeed one can
circumvent the behaviour of the latest beta release of mkiv by using tricks
such as the ones in the example code below, but this should be avoided in
my opinion.
>
> well, it depends on how one sees this '' mess
>
> the problem with primes is that in macro packages they are messy entities
that should collapse or not (active char mess) and the more clever a macro
packages becomes the harder it becomes to makes it robust and/or to fight
against such heuristics
>
> add to that the fact that the symbol itself is a funny positioned
something already raised in a font or not i.e. sometimes in need of
superscript and sometimes explicitly not
>
> for unicode we need to turn two '' into a double and ''' into a and
triple such
>
> that said, in context these thingies are at some point intercepted and
their current state is looked at: superscript? multipel in a row? one ebing
the nucleus of another ... etc .. the current (working again) behavior is
what we support and i don't look forward to more heuristics
>
>
>> The following PDF have been obtained with mkii and mkiv with the
following example code.
>> Best regards: OK
>>
>> %%% begin derivatives-prime.tex
>> \starttext
>>
>> \startformula
>> f''_{2}(x) = f_{2}''(x) = f^{''}_{2}(x) = f_{2}^{''}(x) % =
f^{{}^{''}}_{2}(x)
>> \stopformula
>> As one may see the result of \type{f_{2}''(x) = } $f_{2}''(x)$ is not
correct in \type{mkiv}.
>>
>> The following positions of the superscripts \type{(3)} are correct both
in \type{mkii} and in \type{mkiv}.
>> \startformula
>> f^{(3)}_{2}(x) = f_{2}^{(3)}(x)
>> \stopformula
>>
>> \stoptext
>> %%% end derivatives-prime.tex
>>
>>
>>
>> ____________________________________________________________
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>
>
> --
>
> -----------------------------------------------------------------
> Hans Hagen | PRAGMA ADE
> Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
> tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
> -----------------------------------------------------------------
> ____________________________________________________________
_______________________
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> maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/
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_______________________
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OK, very good, it seems that we have a working solution and one specific
way to write it. I have absolutely nothing against that, but I would like
us (me?) to document it, since I think future users might have use of it.
Is the math page in the wiki the right place?
(It will take some time before I will be able to act. I'm currently
travelling with close to no working connection.)
/Mikael
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the
Wiki!
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