* Math typesetting problems
@ 2013-01-27 11:52 Janne Junnila
2013-01-27 12:09 ` Sietse Brouwer
2013-01-27 15:13 ` Roland Thiers
0 siblings, 2 replies; 15+ messages in thread
From: Janne Junnila @ 2013-01-27 11:52 UTC (permalink / raw)
To: mailing list for ConTeXt users
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Hi all,
I've run into a couple of problems with math typesetting. (I'm using the
latest ConTeXt standalone beta.) The following doesn't print [x,x] at all:
\startformula
[x,x]_t = x
\stopformula
It can be fixed by using \left[x,x\right]_t, but I find the behaviour weird.
Another problem I have is related to the positioning of minus signs in
front of fractions. I would expect the minus sign to align with the
horizontal line of the fraction, as it does on LaTeX. Below is an example
formula to illustrate my point. The result seems to be independent of the
font in use.
\startformula
-\frac{e^{\frac{4}{5}}}{4}
\stopformula
Janne
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^ permalink raw reply [flat|nested] 15+ messages in thread* Re: Math typesetting problems
2013-01-27 11:52 Math typesetting problems Janne Junnila
@ 2013-01-27 12:09 ` Sietse Brouwer
2013-01-27 13:11 ` Janne Junnila
2013-01-27 14:50 ` Rogers, Michael K
2013-01-27 15:13 ` Roland Thiers
1 sibling, 2 replies; 15+ messages in thread
From: Sietse Brouwer @ 2013-01-27 12:09 UTC (permalink / raw)
To: mailing list for ConTeXt users
Hi Janne,
Janne wrote:
> I've run into a couple of problems with math typesetting. (I'm using the
> latest ConTeXt standalone beta.) The following doesn't print [x,x] at all:
>
> \startformula
> [x,x]_t = x
> \stopformula
This is because \startformula can take one optional argument in square
brackets, and [x,x] is interpreted as that argument. You can make
\startformula stop looking for [...] either by telling it to `\relax`,
or by giving it an empty `[]` of its own to chew on.
\startformula[]
[x,x]_t = x
\stopformula
\startformula\relax
[x,x]_t = x
\stopformula
I can't quite find at the moment what sort of options the [...] can
contain, sorry.
Cheers,
Sietse
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* Re: Math typesetting problems
2013-01-27 12:09 ` Sietse Brouwer
@ 2013-01-27 13:11 ` Janne Junnila
2013-01-27 14:50 ` Rogers, Michael K
1 sibling, 0 replies; 15+ messages in thread
From: Janne Junnila @ 2013-01-27 13:11 UTC (permalink / raw)
To: mailing list for ConTeXt users
Hi Sietse,
Sietse wrote:
> This is because \startformula can take one optional argument in square
> brackets, and [x,x] is interpreted as that argument. You can make
> \startformula stop looking for [...] either by telling it to `\relax`,
> or by giving it an empty `[]` of its own to chew on.
Thanks for the explanation, this makes sense. Should have seen that myself. :)
Janne
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* Re: Math typesetting problems
2013-01-27 12:09 ` Sietse Brouwer
2013-01-27 13:11 ` Janne Junnila
@ 2013-01-27 14:50 ` Rogers, Michael K
1 sibling, 0 replies; 15+ messages in thread
From: Rogers, Michael K @ 2013-01-27 14:50 UTC (permalink / raw)
To: mailing list for ConTeXt users
On Jan 27, 2013, at 7:09 AM, Sietse Brouwer <sbbrouwer@gmail.com>
wrote:
> This is because \startformula can take one optional argument in square
> brackets, and [x,x] is interpreted as that argument. You can make
> \startformula stop looking for [...] either by telling it to `\relax`,
> or by giving it an empty `[]` of its own to chew on.
>
> ...
>
> I can't quite find at the moment what sort of options the [...] can
> contain, sorry.
It takes the same options as \switchtobodyfont
\starttext
\startformula[]
[x,x]_t = x
\stopformula
\startformula[small]
[x,x]_t = x
\stopformula
\startformula[24pt]
[x,x]_t = x
\stopformula
\stoptext
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* Re: Math typesetting problems
2013-01-27 11:52 Math typesetting problems Janne Junnila
2013-01-27 12:09 ` Sietse Brouwer
@ 2013-01-27 15:13 ` Roland Thiers
2013-01-28 9:11 ` Janne Junnila
1 sibling, 1 reply; 15+ messages in thread
From: Roland Thiers @ 2013-01-27 15:13 UTC (permalink / raw)
To: mailing list for ConTeXt users
Le 27 janv. 13 à 12:52, Janne Junnila a écrit :
> Hi all,
>
>
>
> Another problem I have is related to the positioning of minus signs
> in front of fractions. I would expect the minus sign to align with
> the horizontal line of the fraction, as it does on LaTeX. Below is
> an example formula to illustrate my point. The result seems to be
> independent of the font in use.
>
> \startformula
> -\frac{e^{\frac{4}{5}}}{4}
> \stopformula
>
>
> Janne
Hi Janne,
With \dfrac it looks good.
With \fraction the minus sign is on the top of the fraction.
Best regards, Roland
> ___________________________________________________________________________________
> 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
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> wiki : http://contextgarden.net
> ___________________________________________________________________________________
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^ permalink raw reply [flat|nested] 15+ messages in thread* Re: Math typesetting problems
2013-01-27 15:13 ` Roland Thiers
@ 2013-01-28 9:11 ` Janne Junnila
2013-01-28 17:34 ` Roland Thiers
2013-01-28 20:56 ` Otared Kavian
0 siblings, 2 replies; 15+ messages in thread
From: Janne Junnila @ 2013-01-28 9:11 UTC (permalink / raw)
To: mailing list for ConTeXt users
Indeed it seems like the alignment is good with \dfrac, but this does
not solve my problem, since I wish to also use fractions with
script-size or scriptscript-size (\xfrac, \xxfrac). The specific
formula I have is
\startformula
f_{B_t | B_s = S, B_u = U}(x) = \frac{e^{-\frac{(u-s)x^2 - 2x(S(u-t) +
U(t-s)) + \frac{(S(u-t) +
U(t-s))^2}{(u-s)}}{2(t-s)(u-t)}}}{\sqrt{2\pi\frac{(t-s)(u-t)}{u-s}}}
\stopformula
Thanks,
Janne
Roland wrote:
> With \dfrac it looks good.
> With \fraction the minus sign is on the top of the fraction.
> Best regards, Roland
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^ permalink raw reply [flat|nested] 15+ messages in thread* Re: Math typesetting problems
2013-01-28 9:11 ` Janne Junnila
@ 2013-01-28 17:34 ` Roland Thiers
2013-01-28 19:41 ` Aditya Mahajan
2013-01-28 20:56 ` Otared Kavian
1 sibling, 1 reply; 15+ messages in thread
From: Roland Thiers @ 2013-01-28 17:34 UTC (permalink / raw)
To: mailing list for ConTeXt users
Le 28 janv. 13 à 10:11, Janne Junnila a écrit :
> Indeed it seems like the alignment is good with \dfrac, but this does
> not solve my problem, since I wish to also use fractions with
> script-size or scriptscript-size (\xfrac, \xxfrac). The specific
> formula I have is
>
> \startformula
> f_{B_t | B_s = S, B_u = U}(x) = \frac{e^{-\frac{(u-s)x^2 - 2x(S(u-t) +
> U(t-s)) + \frac{(S(u-t) +
> U(t-s))^2}{(u-s)}}{2(t-s)(u-t)}}}{\sqrt{2\pi\frac{(t-s)(u-t)}{u-s}}}
> \stopformula
>
> Thanks,
> Janne
OK !
So you need an expert, I'm just a newbie :)
I would be interested to know how to do that.
Best, Roland
>
>
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an
> entry to the Wiki!
>
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> wiki : http://contextgarden.net
> ___________________________________________________________________________________
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^ permalink raw reply [flat|nested] 15+ messages in thread* Re: Math typesetting problems
2013-01-28 17:34 ` Roland Thiers
@ 2013-01-28 19:41 ` Aditya Mahajan
2013-01-28 20:33 ` Wolfgang Schuster
0 siblings, 1 reply; 15+ messages in thread
From: Aditya Mahajan @ 2013-01-28 19:41 UTC (permalink / raw)
To: mailing list for ConTeXt users
[-- Attachment #1: Type: TEXT/PLAIN, Size: 889 bytes --]
On Mon, 28 Jan 2013, Roland Thiers wrote:
>
> Le 28 janv. 13 à 10:11, Janne Junnila a écrit :
>
>> Indeed it seems like the alignment is good with \dfrac, but this does
>> not solve my problem, since I wish to also use fractions with
>> script-size or scriptscript-size (\xfrac, \xxfrac). The specific
>> formula I have is
>>
>> \startformula
>> f_{B_t | B_s = S, B_u = U}(x) = \frac{e^{-\frac{(u-s)x^2 - 2x(S(u-t) +
>> U(t-s)) + \frac{(S(u-t) +
>> U(t-s))^2}{(u-s)}}{2(t-s)(u-t)}}}{\sqrt{2\pi\frac{(t-s)(u-t)}{u-s}}}
>> \stopformula
>>
>> Thanks,
>> Janne
> OK !
> So you need an expert, I'm just a newbie :)
> I would be interested to know how to do that.
> Best, Roland
I'll look into fractions later this week. All the fraction macros of
ConTeXt were based on \genfrac macro from AMSTeX so, in principle, they
should behave in the same manner.
Aditya
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^ permalink raw reply [flat|nested] 15+ messages in thread* Re: Math typesetting problems
2013-01-28 19:41 ` Aditya Mahajan
@ 2013-01-28 20:33 ` Wolfgang Schuster
2013-01-28 20:48 ` Aditya Mahajan
2013-01-28 23:20 ` Khaled Hosny
0 siblings, 2 replies; 15+ messages in thread
From: Wolfgang Schuster @ 2013-01-28 20:33 UTC (permalink / raw)
To: mailing list for ConTeXt users
Am 28.01.2013 um 20:41 schrieb Aditya Mahajan <adityam@umich.edu>:
> On Mon, 28 Jan 2013, Roland Thiers wrote:
>
>>
>> Le 28 janv. 13 à 10:11, Janne Junnila a écrit :
>>
>>> Indeed it seems like the alignment is good with \dfrac, but this does
>>> not solve my problem, since I wish to also use fractions with
>>> script-size or scriptscript-size (\xfrac, \xxfrac). The specific
>>> formula I have is
>>> \startformula
>>> f_{B_t | B_s = S, B_u = U}(x) = \frac{e^{-\frac{(u-s)x^2 - 2x(S(u-t) +
>>> U(t-s)) + \frac{(S(u-t) +
>>> U(t-s))^2}{(u-s)}}{2(t-s)(u-t)}}}{\sqrt{2\pi\frac{(t-s)(u-t)}{u-s}}}
>>> \stopformula
>>> Thanks,
>>> Janne
>> OK !
>> So you need an expert, I'm just a newbie :)
>> I would be interested to know how to do that.
>> Best, Roland
>
> I'll look into fractions later this week. All the fraction macros of ConTeXt were based on \genfrac macro from AMSTeX so, in principle, they should behave in the same manner.
The \frac command uses \vcenter for the content while \dfrac and \tfrac only set the mathstyle before placing the content with the \over primitive.
Wolfgang
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^ permalink raw reply [flat|nested] 15+ messages in thread* Re: Math typesetting problems
2013-01-28 20:33 ` Wolfgang Schuster
@ 2013-01-28 20:48 ` Aditya Mahajan
2013-01-28 20:59 ` Wolfgang Schuster
2013-01-28 23:20 ` Khaled Hosny
1 sibling, 1 reply; 15+ messages in thread
From: Aditya Mahajan @ 2013-01-28 20:48 UTC (permalink / raw)
To: mailing list for ConTeXt users
On Mon, 28 Jan 2013, Wolfgang Schuster wrote:
>> I'll look into fractions later this week. All the fraction macros of ConTeXt were based on \genfrac macro from AMSTeX so, in principle, they should behave in the same manner.
>
> The \frac command uses \vcenter for the content while \dfrac and \tfrac
> only set the mathstyle before placing the content with the \over
> primitive.
Then something has been lost in the MkII -> MkIV transition. I am pretty
sure (cannot check right now), that the code in MkII used \genfrac (which
is a fancy wrapper around \over \ovewithdelim etc)
Aditya
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* Re: Math typesetting problems
2013-01-28 20:48 ` Aditya Mahajan
@ 2013-01-28 20:59 ` Wolfgang Schuster
0 siblings, 0 replies; 15+ messages in thread
From: Wolfgang Schuster @ 2013-01-28 20:59 UTC (permalink / raw)
To: mailing list for ConTeXt users
Am 28.01.2013 um 21:48 schrieb Aditya Mahajan <adityam@umich.edu>:
> On Mon, 28 Jan 2013, Wolfgang Schuster wrote:
>
>>> I'll look into fractions later this week. All the fraction macros of ConTeXt were based on \genfrac macro from AMSTeX so, in principle, they should behave in the same manner.
>>
>> The \frac command uses \vcenter for the content while \dfrac and \tfrac only set the mathstyle before placing the content with the \over primitive.
>
> Then something has been lost in the MkII -> MkIV transition. I am pretty sure (cannot check right now), that the code in MkII used \genfrac (which is a fancy wrapper around \over \ovewithdelim etc)
Yes, MkII uses \genfrac but in MkIV the command is no longer available and all fraction commands have been rewritten.
Wolfgang
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* Re: Math typesetting problems
2013-01-28 20:33 ` Wolfgang Schuster
2013-01-28 20:48 ` Aditya Mahajan
@ 2013-01-28 23:20 ` Khaled Hosny
2013-04-06 21:35 ` Hans Hagen
1 sibling, 1 reply; 15+ messages in thread
From: Khaled Hosny @ 2013-01-28 23:20 UTC (permalink / raw)
To: mailing list for ConTeXt users
On Mon, Jan 28, 2013 at 09:33:52PM +0100, Wolfgang Schuster wrote:
>
> The \frac command uses \vcenter for the content while \dfrac and
> \tfrac only set the mathstyle before placing the content with the
> \over primitive.
The use of \vcenter seems odd here as it means the fraction rule will no
longer guranteed to be centered around the math axis:
\starttext
\math{-\frac{a^{2^{2^2}}}{a} {a^{2^{2^2}}\over a}}
\stoptext
Also, why \frac is forcing text style fractions even in display mode?
\starttext
\startformula
-\frac{a^{2^{2^2}}}{a} {a^{2^{2^2}}\over a}
\stopformula
\stoptext
Both behaviours are different from MkII.
Regards,
Khaled
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^ permalink raw reply [flat|nested] 15+ messages in thread* Re: Math typesetting problems
2013-01-28 23:20 ` Khaled Hosny
@ 2013-04-06 21:35 ` Hans Hagen
0 siblings, 0 replies; 15+ messages in thread
From: Hans Hagen @ 2013-04-06 21:35 UTC (permalink / raw)
To: mailing list for ConTeXt users
On 1/29/2013 12:20 AM, Khaled Hosny wrote:
> On Mon, Jan 28, 2013 at 09:33:52PM +0100, Wolfgang Schuster wrote:
>>
>> The \frac command uses \vcenter for the content while \dfrac and
>> \tfrac only set the mathstyle before placing the content with the
>> \over primitive.
>
> The use of \vcenter seems odd here as it means the fraction rule will no
> longer guranteed to be centered around the math axis:
> \starttext
> \math{-\frac{a^{2^{2^2}}}{a} {a^{2^{2^2}}\over a}}
> \stoptext
>
> Also, why \frac is forcing text style fractions even in display mode?
> \starttext
> \startformula
> -\frac{a^{2^{2^2}}}{a} {a^{2^{2^2}}\over a}
> \stopformula
> \stoptext
>
> Both behaviours are different from MkII.
I redid the mkiv code ... configurable, defineable, inheritable ... the
whole lot
\starttext
\definemathfraction[myfrac] [mathstyle=script]
\definemathfraction[myfracx][mathstyle=script,alternative=outer]
\startformula
{a^{2^{2^2}}\over a}
\frac{a^{2^{2^2}}}{a}
\frac{a^{2}}{b}
\myfrac{a^{2}}{b}
\myfracx{a^{2}}{b}
\stopformula
\stoptext
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^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: Math typesetting problems
2013-01-28 9:11 ` Janne Junnila
2013-01-28 17:34 ` Roland Thiers
@ 2013-01-28 20:56 ` Otared Kavian
2013-01-28 21:09 ` Aditya Mahajan
1 sibling, 1 reply; 15+ messages in thread
From: Otared Kavian @ 2013-01-28 20:56 UTC (permalink / raw)
To: mailing list for ConTeXt users
Hi Janne,
Personnally I prefer to use the Plain TeX alternative \over (which works fine in ConTeXt), that is
${a \over b}$
instead of
$\frac{a}{b}$
Compare the following two outputs in the example you want to typeset: I think the second is more or less what you want
\starttext
Using \type{\frac} gives:
\startformula
f_{B_t | B_s = S, B_u = U}(x) = \frac{e^{-\frac{(u-s)x^2 - 2x(S(u-t) +
U(t-s)) + \frac{(S(u-t) +
U(t-s))^2}{(u-s)}}{2(t-s)(u-t)}}}{\sqrt{2\pi\frac{(t-s)(u-t)}{u-s}}}
\stopformula
\blank
Using \type{\over} gives:
\startformula
f_{B_t | B_s = S, B_u = U}(x) = {
e^{-{(u-s)x^2 - 2x(S(u-t) + U(t-s)) +
{(S(u-t) + U(t-s))^2 \over (u-s)} \over 2(t-s)(u-t)}} \over
\sqrt{2\pi {(t-s)(u-t) \over u-s}}}
\stopformula
\stoptext
Best regards: OK
On 28 janv. 2013, at 10:11, Janne Junnila <janne.junnila@gmail.com> wrote:
> Indeed it seems like the alignment is good with \dfrac, but this does
> not solve my problem, since I wish to also use fractions with
> script-size or scriptscript-size (\xfrac, \xxfrac). The specific
> formula I have is
>
> \startformula
> f_{B_t | B_s = S, B_u = U}(x) = \frac{e^{-\frac{(u-s)x^2 - 2x(S(u-t) +
> U(t-s)) + \frac{(S(u-t) +
> U(t-s))^2}{(u-s)}}{2(t-s)(u-t)}}}{\sqrt{2\pi\frac{(t-s)(u-t)}{u-s}}}
> \stopformula
>
> Thanks,
> Janne
>
> Roland wrote:
>> With \dfrac it looks good.
>> With \fraction the minus sign is on the top of the fraction.
>> Best regards, Roland
> ___________________________________________________________________________________
> 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://tex.aanhet.net
> archive : http://foundry.supelec.fr/projects/contextrev/
> wiki : http://contextgarden.net
> ___________________________________________________________________________________
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!
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___________________________________________________________________________________
^ permalink raw reply [flat|nested] 15+ messages in thread* Re: Math typesetting problems
2013-01-28 20:56 ` Otared Kavian
@ 2013-01-28 21:09 ` Aditya Mahajan
0 siblings, 0 replies; 15+ messages in thread
From: Aditya Mahajan @ 2013-01-28 21:09 UTC (permalink / raw)
To: mailing list for ConTeXt users
On Mon, 28 Jan 2013, Otared Kavian wrote:
> Hi Janne,
>
> Personnally I prefer to use the Plain TeX alternative \over (which works fine in ConTeXt), that is
> ${a \over b}$
> instead of
> $\frac{a}{b}$
>
> Compare the following two outputs in the example you want to typeset: I think the second is more or less what you want
>
> \starttext
> Using \type{\frac} gives:
> \startformula
> f_{B_t | B_s = S, B_u = U}(x) = \frac{e^{-\frac{(u-s)x^2 - 2x(S(u-t) +
> U(t-s)) + \frac{(S(u-t) +
> U(t-s))^2}{(u-s)}}{2(t-s)(u-t)}}}{\sqrt{2\pi\frac{(t-s)(u-t)}{u-s}}}
> \stopformula
Formatting and temporary macros (I usually use \1 \2 etc) make a huge difference
in readability:
\startformula
\def\1
{\frac{
(u-s)x^2
- 2x(S(u-t)
+ U(t-s))
+ \frac{(S(u-t) + U(t-s))^2}
{(u-s)}
}{
2(t-s)(u-t)}
}
%
f_{B_t | B_s = S, B_u = U}(x) =
\frac { e^{\1} }
{ \sqrt{2\pi\frac{(t-s)(u-t)}{u-s}} }
\stopformula
> \blank
> Using \type{\over} gives:
> \startformula
> f_{B_t | B_s = S, B_u = U}(x) = {
> e^{-{(u-s)x^2 - 2x(S(u-t) + U(t-s)) +
> {(S(u-t) + U(t-s))^2 \over (u-s)} \over 2(t-s)(u-t)}} \over
> \sqrt{2\pi {(t-s)(u-t) \over u-s}}}
> \stopformula
>
> \stoptext
At some stage, we also need to look at nath's automatic conversion of display
fractions to inline fractions (e.g., in the numberator \frac{ (S(u-t) +
U(t-s))^2 } { (u-s) } should be typeset as (S(u-t) + U(t-s))^2/(u-s) because it
is being typeset in \scriptstyle.
Aditya
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^ permalink raw reply [flat|nested] 15+ messages in thread
end of thread, other threads:[~2013-04-06 21:35 UTC | newest]
Thread overview: 15+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2013-01-27 11:52 Math typesetting problems Janne Junnila
2013-01-27 12:09 ` Sietse Brouwer
2013-01-27 13:11 ` Janne Junnila
2013-01-27 14:50 ` Rogers, Michael K
2013-01-27 15:13 ` Roland Thiers
2013-01-28 9:11 ` Janne Junnila
2013-01-28 17:34 ` Roland Thiers
2013-01-28 19:41 ` Aditya Mahajan
2013-01-28 20:33 ` Wolfgang Schuster
2013-01-28 20:48 ` Aditya Mahajan
2013-01-28 20:59 ` Wolfgang Schuster
2013-01-28 23:20 ` Khaled Hosny
2013-04-06 21:35 ` Hans Hagen
2013-01-28 20:56 ` Otared Kavian
2013-01-28 21:09 ` Aditya Mahajan
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