* Re: Fwd: Re: The binomial coefficients do not look optimal
2017-09-02 16:36 ` Fwd: Re: The binomial coefficients do not look optimal Hans Hagen
@ 2017-09-05 18:21 ` Mikael P. Sundqvist
0 siblings, 0 replies; 2+ messages in thread
From: Mikael P. Sundqvist @ 2017-09-05 18:21 UTC (permalink / raw)
To: mailing list for ConTeXt users
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On Sat, Sep 2, 2017 at 6:36 PM, Hans Hagen <pragma@wxs.nl> wrote:
>
>
>
> -------- Forwarded Message --------
> Subject: Re: [NTG-context] The binomial coefficients do not look optimal
> Date: Sat, 2 Sep 2017 18:35:53 +0200
> From: Hans Hagen <pragma@wxs.nl>
> To: Mikael P. Sundqvist <mickep@gmail.com>
>
> On 9/2/2017 4:58 PM, Mikael P. Sundqvist wrote:
>
>> On Fri, Sep 1, 2017 at 7:49 PM, Hans Hagen <pragma@wxs.nl <mailto:
>> pragma@wxs.nl>> wrote:
>>
>> On 9/1/2017 1:56 PM, Mikael P. Sundqvist wrote:
>>
>> Hi,
>>
>> I stumbled upon this (see the attached file for the result):
>>
>> %%% Test file
>> \setupbodyfont[10pt]
>> \starttext
>> \startTEXpage[offset=10pt]
>> \type{\tbinom{n}{k}}: $\tbinom{n}{k}$, (does not look good, the
>> vertical space between $n$ and $k$ is too big) \par
>> \type{\binom{n}{k}}: $\binom{n}{k}$ (looks fine to me)\par
>> \type{\dbinom{n}{k}}: $\dbinom{n}{k}$ (does not look good, too
>> big parenthesis, even for displayed formulas).\par
>> \stopTEXpage
>> \stoptext
>> %%% End of test file
>>
>> I think something should be changed to get the binomial
>> coefficients to look better. In particular I am concerned about
>> the rather big parenthesis in displaystyle (and not so much
>> about the vertical space issue in \tbinom).
>>
>> /Mikael
>>
>> PS The result looked better if I used the lucida fonts, if that
>> helps.
>>
>> This is indeed font dependent. These binoms use a low level tex
>> primitive that uses a threshold for steps and that one is part of
>> the math parameters of a font and these are not that good for lm. As
>> I'm looking into some other low level side effect I was in the mood
>> for a configuration option for \setupmathfractions.
>>
>> So, in the next beta you can get the effects iof the attached:
>>
>> - relate the threshold to the bodyfont size
>> - use normal left/right fences instead
>>
>> fwiw, cambria and pagella look better too. Upto you to wikify it.
>>
>> Hans
>>
>> -----------------------------------------------------------------
>> Hans Hagen | PRAGMA ADE
>> Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
>> tel: 038 477 53 69 | www.pragma-ade.nl
>> <http://www.pragma-ade.nl> | www.pragma-pod.nl
>> <http://www.pragma-pod.nl>
>> -----------------------------------------------------------------
>>
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>>
>> Thank you very much, I'm looking forward to the next beta, and I will try
>> to wikify it when I have tried it out. Also lucida looks better than latin
>> modern does at the moment.
>>
>> I am a bit confused about the different versions. I would have guessed
>> that there was \tbinom and \dbinom and that \binom used one of them
>> depending on if one is in text mode or in display mode (just as I would
>> expect \frac to behave like \tfrac in text mode and \dfrac in display
>> mode). But \tbinom looks very different from \binom in text mode (with more
>> vertical space). Is this on purpose? Have I missed something?
>>
> One can configure those things but the absense of rules and presence of
> fences matters too (all kind of inter-this-or-that and
> above-below-this-or-that playts a role).
>
> Hans
>
> -----------------------------------------------------------------
> Hans Hagen | PRAGMA ADE
> Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
> tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
> -----------------------------------------------------------------
> ____________________________________________________________
> _______________________
> 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/list
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> webpage : http://www.pragma-ade.nl / http://context.aanhet.net
> archive : https://bitbucket.org/phg/context-mirror/commits/
> wiki : http://contextgarden.net
> ____________________________________________________________
> _______________________
Today the new beta appeared, so I added something on the wiki,
http://wiki.contextgarden.net/Math/fractions
(I am not sure how to use the threshold key, so I made no examples with
that.)
Thanks, Hans, for the very quick new feature!
/Mikael
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