On Thu, May 11, 2017 at 8:35 PM, Mathias Schickel wrote:

...

2) The math font looks strange (or should I say different) in the ConTeXt example. (Wrong size, scaled?)

Yeah, this seems to be a bug in the current version. I have observed that, too. Hans did recently add (due to my suggestion, so thanks again, Hans, even if this seems to have caused some trouble) support for optical sizes in fallbacks and I suppose the bug has been introduced there. So at present the bug occurs that ConTeXt uses the smallest optical size for every symbol (independent of the size). This results in strange looking mathematics. Maybe you can fix this, Hans?

-Mathias

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Am 11.05.2017 um 18:51 schrieb Mikael P. Sundqvist :

Dear list,

I posted this question on stack exchange (https://tex.stackexchange.com/q/369226/52406), and got the suggestion that it might be a bug, and therefore I post it here as well:

I have a problem with typesetting derivatives (and latin modern) in ConTeXt in latest standalone.

Minimal example:

\starttext Compare $u_p''$ and $u''_p$ with $u''$ \stoptext

Please see the attached image for the output (here I have also included the corresponding output, compiling a similar simple document in LaTeX, where things look as I expect.)

Basically, I have two questions:

1) How should I write derivatives (say second derivatives) in ConTeXt? I think that the primes are too far away from each other. In particular when the subscript $p$ is there (the first formula).

2) The math font looks strange (or should I say different) in the ConTeXt example. (Wrong size, scaled?)

For a while I thought that the second problem might be because I define no font. But the following example gives a similar result.

\definefontfamily[myface][rm][Latin Modern Roman] \definefontfamily[myface][mm][Latin Modern Math]

\setupbodyfont[myface]

\starttext Compare $u_p''$ and $u''_p$ with $u''$ \stoptext

Any ideas?

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Thank you Mathias for your answer! That is most likely the problem! Then we can only wait for Hans to put a new beta out. Hans, will that happen soon? Also, Hans, what is the official ConTeXt-way to write u with double prime and subscript p, as in the example? Should both $u_p''$ and $u''_p$ work? Best regards, Mikael

On Sat, May 13, 2017 at 7:05 PM, Hans Hagen wrote:

On 5/11/2017 8:35 PM, Mathias Schickel wrote:

...

...

2) The math font looks strange (or should I say different) in the ConTeXt example. (Wrong size, scaled?)

Yeah, this seems to be a bug in the current version. I have observed that, too. Hans did recently add (due to my suggestion, so thanks again, Hans, even if this seems to have caused some trouble) support for optical sizes in fallbacks and I suppose the bug has been introduced there. So at present the bug occurs that ConTeXt uses the smallest optical size for every symbol (independent of the size). This results in strange looking mathematics. Maybe you can fix this, Hans?

Yes, in that process i swapped text and scriptscipt sizes but it has been fixed.

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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 ___________________________________________________________________________________

Hans, thanks for the fix with the sizes in math. Will the primes also get fixed? In the latest standalone (I downloaded it minutes ago), I get the attached result running the same test file. /Mikael PS Sorry if I'm too quick, if you are in the progress of solving this.