# Re: [NTG-context] Second derivative ''

On 3/5/2020 5:41 PM, Mikael P. Sundqvist wrote:


On Thu, 5 Mar 2020, Hans Hagen wrote:

> On 3/4/2020 11:44 PM, Weber, Matthias wrote:
>> Dear List,
>>
>> \starttext
>> \startformula
>> \left(f\right)'' = f''
>> \stopformula
>> \stoptext
>>
>> has the second apostrophe set too low. This is in MKIV on
ConTeXt live as
> well as in my slightly older version.
>> What is the “right” way to typeset a second derivative?
> you have to turn on
>
> \setupmathematics
>   [collapsing=3]
>
> but it has the side effect of also collapsing more:
>
> $x'' >= 10$
>
> (which is why the mechanism is currently turned off by default)
>
> i'll think about an option that only does some specific ones only
>
> (btw, i love tex but these primes are a bit painful due to th
eorriginal
> approach which has lead mixtures of (1) raised in the font and/or
raised
> in the engine, (2) them being superscripts but not really, (3) fonts
> therefore doing it inconsistently, (4) some parsing related to
multiple
> scripts, (5) double, tripple, etc primes being real unicode
characters
> but spaced singles in traditional tex (which itself then
introduces some
> size juggling) ... i could proabbly write a few pages about it)

So what's the best way to input them: using \prime, \prime\prime, etc.?

entry to the Wiki!

maillist : ntg-context@ntg.nl <mailto:ntg-context@ntg.nl> /
http://www.ntg.nl/mailman/listinfo/ntg-context
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki     : http://contextgarden.net

___________________________________________________________________________________

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
[collapsing=1]

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


Hans

-----------------------------------------------------------------
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-----------------------------------------------------------------
___________________________________________________________________________________