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Sat, 12 Oct 2024 07:11:51 -0700 (PDT) MIME-Version: 1.0 References: <20241009181650.05b36f22@boo.my.domain> In-Reply-To: From: Alan Bowen Date: Sat, 12 Oct 2024 10:11:39 -0400 Message-ID: To: mailing list for ConTeXt users Message-ID-Hash: CHGVX2KW2HR3TONF643OM7ED3423FZTF X-Message-ID-Hash: CHGVX2KW2HR3TONF643OM7ED3423FZTF X-MailFrom: bowenalan03@gmail.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.9 Precedence: list Reply-To: mailing list for ConTeXt users Subject: [NTG-context] Re: equation to right margin List-Id: mailing list for ConTeXt users Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: Content-Type: multipart/mixed; boundary="===============7076251537363195813==" --===============7076251537363195813== Content-Type: multipart/alternative; boundary="0000000000005b9b710624482fd6" --0000000000005b9b710624482fd6 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi, Mikael=E2=80=94 In answer to your question: I am one of two editors of *Aestimatio: Sources and Studies in the History of Science*, where the science in question is premodern. As it turns out, our publications tend to the history of mathematics and astronomy (Babylonian, Egyptian, Greco-Roman, Arabic), where the math, though common enough, is pretty much limited to arithmetical computations and trigonometry. The paper that introduced the problem of grouping is actually a lengthy review of a book on Heron=E2=80= =99s *Arithmetica*. Your exchanges with Aditya are very interesting and, for me, most informative. Many thanks! Alan On Thu, Oct 10, 2024 at 1:36=E2=80=AFAM Mikael Sundqvist = wrote: > Hi, > > A. Bowen: The cases are meant for when you divide something into > cases, as in the example below with the absolute value. It is a kind > of inline part of a formula, and I would claim that when you number an > equation, you do not number one case of a cases, but the equation. If > you refer to it, you talk abou "the second line in (1)" if you need to > specify. I also get a bit curious, are you editor of some math journal > that is typeset by ConTeXt? > > A. Braslau: I agree that it is common to put the brace on the left, > but I insist that it makes more sense to put it on the right _if_ you > have equation numbers on the right. If equation numbers are to the > left, it makes sense to put the brace on the left. Nevertheless, to > put the brace on the left side and numbering on the right is possible > (see example below). But the equation number in this case is sitting > in between the two equations, and that is disturbing. If there would > be three lines, one could argue that it would sit on the middle one. > Or not distinguish it from the case where it sits on the middle line. > > The good thing is of course that one can do as one please. > > \starttext > \startformula > \abs{x} =3D > \startcases > \NC x, \NC x > 0; \NR > \NC 0, \NC x =3D 0; \NR > \NC -x, \NC x < 0. \NR > \stopcases > \numberhere[eq:foo] > \stopformula > > \startformula > \startalign > [location=3Dpacked,fences=3Dcases] > \NC \[21-(9 - n^2)\NC =3D=E2=96=A1^\prime\]\NR > \NC n^2+12 \NC=3D=E2=96=A1^\prime. \NR > \stopalign > \numberhere[eq:foo] > \stopformula > > \stoptext > > /Mikael > > On Thu, Oct 10, 2024 at 2:21=E2=80=AFAM Alan Braslau via ntg-context > wrote: > > > > It is common, when writing a system of equations, to put a brace on the > > left. It could make sense to number this system of equations with a > > single number, on the right and aligned with the right margin. It would > > also make sense for this number to be aligned with the middle of the > > two equations of the system. > > > > A brace on the right would not introduce the grouping as a system of > > equations, rather as a pair of equations sharing a common number. > > > > Alan > > > > > > > > On Wed, 9 Oct 2024 12:20:00 -0400 > > Alan Bowen wrote: > > > > > I understand. The reasoning makes sense to me and, as editor of a > > > paper in which this appears, I will ask the author to consider > > > dropping the brace. > > > > > > I wonder of there is some similar thinking underlying the fact that > > > \startcases... puts the equation number so close to the equation > > > itself and not at a margin (typically right). > > > > > > Again, many thanks, Mikael. > > > Alan > > > > > > On Wed, Oct 9, 2024 at 12:12=E2=80=AFPM Mikael Sundqvist > > > wrote: > > > > > > > Hi, > > > > > > > > I think what you ask for was never supported in ConTeXt, for a > > > > reason. The idea is that either one groups a set of equations with > > > > a brace and numbers them with one number, or one does not group, > > > > and then one can number each line separately/independently. > > > > Grouping on the left with a brace and numbering one line to the > > > > right is, even if we see that often, not really logical. > > > > > > > > If there is a large request for doing this, I can talk to Hans abou= t > > > > it, maybe it is easy on the code side to support it. But I remember > > > > from when we were messing with numbering, and in particular when > > > > there are alignments, that it is a bit complicated. > > > > > > > > /Mikael > > > > > > > > On Wed, Oct 9, 2024 at 5:19=E2=80=AFPM Alan Bowen > > > > wrote: > > > > > > > > > > Thank you, Mikael. That is very helpful and much appreciated. > > > > > > > > > > What I now have is: > > > > > \startplaceformula > > > > > \startformula > > > > > \startalign > > > > > \NC \[21-(9 - n^2)\NC =3D=E2=96=A1^\prime\] \NR[eq:1] > > > > > \NC n^2+12 \NC=3D=E2=96=A1^\prime. \NR[eq:2] > > > > > \stopalign > > > > > \stopformula > > > > > \stopplaceformula > > > > > which put the numbers at the right margin,as I wanted. > > > > > > > > > > So how do I get a brace on the left rather than on the right? Or > > > > > is > > > > there documentation that explains this? > > > > > > > > > > Alan > > > > > > > > > > On Wed, Oct 9, 2024 at 10:22=E2=80=AFAM Mikael Sundqvist > > > > > > > > > wrote: > > > > >> > > > > >> Hi, > > > > >> > > > > >> On Mon, Oct 7, 2024 at 11:45=E2=80=AFPM Alan Bowen > > > > >> > > > > wrote: > > > > >> > > > > > >> > I have the following which works, except for the fact that the > > > > equation number does not go to the right margin. > > > > >> > > > > > >> > \startplaceformula > > > > >> > \startformula[align=3Dmiddle, prefix=3Dno] > > > > >> > \startcases[distance=3D2pt] > > > > >> > \NC \[21-(9 - n^2)\NC =3D=E2=96=A1^\prime\]\NR > > > > >> > \NC\hfill n^2+12 \NC=3D=E2=96=A1^\prime.\NR[eq04] > > > > >> > \stopcases > > > > >> > \stopformula > > > > >> > \stopplaceformula > > > > >> > > > > > >> > I expect that I have missed something pretty basic here, so an= y > > > > guidance will be greatly appreciated. > > > > >> > > > > >> Maybe I misunderstand you, but I do not think cases is right > > > > >> here. Also, are you sure you want to group two equations but > > > > >> only number one of them. > > > > >> > > > > >> If I understand you correctly, I'd try with one of these, > > > > >> depending on if citing the group or one of the equations. > > > > >> > > > > >> \starttext > > > > >> > > > > >> \startformula > > > > >> \startalign[location=3Dpacked,fences=3Dsesac] > > > > >> \NC \[21-(9 - n^2)\NC =3D=E2=96=A1^\prime\]\NR > > > > >> \NC n^2+12 \NC=3D=E2=96=A1^\prime. \NR > > > > >> \stopalign > > > > >> \numberhere[eq:foo] > > > > >> \stopformula > > > > >> > > > > >> \startplaceformula > > > > >> \startformula > > > > >> \startalign > > > > >> \NC \[21-(9 - n^2)\NC =3D=E2=96=A1^\prime\] \NR%[eq:bar-a= ] > > > > >> \NC n^2+12 \NC=3D=E2=96=A1^\prime. \NR[eq:bar-b] > > > > >> \stopalign > > > > >> \stopformula > > > > >> \stopplaceformula > > > > >> > > > > >> \stoptext > > > > >> > > > > >> /Mikael > > > > >> > > > _________________________________________________________________________= __________ > > If your question is of interest to others as well, please add an entry > to the Wiki! > > > > maillist : ntg-context@ntg.nl / > https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl > > webpage : https://www.pragma-ade.nl / https://context.aanhet.net > (mirror) > > archive : https://github.com/contextgarden/context > > wiki : https://wiki.contextgarden.net > > > _________________________________________________________________________= __________ > > _________________________________________________________________________= __________ > If your question is of interest to others as well, please add an entry to > the Wiki! > > maillist : ntg-context@ntg.nl / > https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl > webpage : https://www.pragma-ade.nl / https://context.aanhet.net (mirror= ) > archive : https://github.com/contextgarden/context > wiki : https://wiki.contextgarden.net > > _________________________________________________________________________= __________ > --0000000000005b9b710624482fd6 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi, Mikael=E2=80=94

In answer to your question: I am one of two e= ditors of Aestimatio: Sources=C2=A0and Studies=C2=A0in the History of Sc= ience, where the science in question is premodern. As it turns out, our= publications tend to the history=C2=A0of mathematics and astronomy (Babylo= nian, Egyptian, Greco-Roman, Arabic), where the math, though common enough,= is pretty much limited to arithmetical computations=C2=A0and trigonometry.= The paper that introduced the problem of grouping is actually a lengthy re= view of a book on Heron=E2=80=99s Arithmetica.

=
Your=C2=A0exchanges=C2=A0with Aditya are very interesting= and, for me, most informative.

Many= thanks!

Alan

On Thu, Oct 10, 2= 024 at 1:36=E2=80=AFAM Mikael Sundqvist <mickep@gmail.com> wrote:
Hi,

A. Bowen: The cases are meant for when you divide something into
cases, as in the example below with the absolute value. It is a kind
of inline part of a formula, and I would claim that when you number an
equation, you do not number one case of a cases, but the equation. If
you refer to it, you talk abou "the second line in (1)" if you ne= ed to
specify. I also get a bit curious, are you editor of some math journal
that is typeset by ConTeXt?

A. Braslau: I agree that it is common to put the brace on the left,
but I insist that it makes more sense to put it on the right _if_ you
have equation numbers on the right. If equation numbers are to the
left, it makes sense to put the brace on the left. Nevertheless, to
put the brace on the left side and numbering on the right is possible
(see example below). But the equation number in this case is sitting
in between the two equations, and that is disturbing. If there would
be three lines, one could argue that it would sit on the middle one.
Or not distinguish it from the case where it sits on the middle line.

The good thing is of course that one can do as one please.

\starttext
\startformula
=C2=A0 \abs{x} =3D
=C2=A0 \startcases
=C2=A0 =C2=A0 \NC=C2=A0 x, \NC x > 0; \NR
=C2=A0 =C2=A0 \NC=C2=A0 0, \NC x =3D 0; \NR
=C2=A0 =C2=A0 \NC -x, \NC x < 0. \NR
=C2=A0 \stopcases
=C2=A0 \numberhere[eq:foo]
\stopformula

\startformula
=C2=A0 \startalign
=C2=A0 =C2=A0 [location=3Dpacked,fences=3Dcases]
=C2=A0 =C2=A0 \NC \[21-(9 - n^2)\NC =3D=E2=96=A1^\prime\]\NR
=C2=A0 =C2=A0 \NC=C2=A0 n^2+12 \NC=3D=E2=96=A1^\prime.=C2=A0 =C2=A0 =C2=A0 = =C2=A0 \NR
=C2=A0 \stopalign
=C2=A0 \numberhere[eq:foo]
\stopformula

\stoptext

/Mikael

On Thu, Oct 10, 2024 at 2:21=E2=80=AFAM Alan Braslau via ntg-context
<ntg-context@ntg= .nl> wrote:
>
> It is common, when writing a system of equations, to put a brace on th= e
> left. It could make sense to number this system of equations with a > single number, on the right and aligned with the right margin. It woul= d
> also make sense for this number to be aligned with the middle of the > two equations of the system.
>
> A brace on the right would not introduce the grouping as a system of > equations, rather as a pair of equations sharing a common number.
>
> Alan
>
>
>
> On Wed, 9 Oct 2024 12:20:00 -0400
> Alan Bowen <bowenalan03@gmail.com> wrote:
>
> > I understand. The reasoning makes sense to me and, as editor of a=
> > paper in which this appears, I will ask the author to consider > > dropping the brace.
> >
> > I wonder of there is some similar thinking underlying the fact th= at
> > \startcases... puts the equation number so close to the equation<= br> > > itself and not at a margin (typically right).
> >
> > Again, many thanks, Mikael.
> > Alan
> >
> > On Wed, Oct 9, 2024 at 12:12=E2=80=AFPM Mikael Sundqvist <mickep@gmail.com><= br> > > wrote:
> >
> > > Hi,
> > >
> > > I think what you ask for was never supported in ConTeXt, for= a
> > > reason. The idea is that either one groups a set of equation= s with
> > > a brace and numbers them with one number, or one does not gr= oup,
> > > and then one can number each line separately/independently.<= br> > > > Grouping on the left with a brace and numbering one line to = the
> > > right is, even if we see that often, not really logical.
> > >
> > > If there is a large request for doing this, I can talk to Ha= ns about
> > > it, maybe it is easy on the code side to support it. But I r= emember
> > > from when we were messing with numbering, and in particular = when
> > > there are alignments, that it is a bit complicated.
> > >
> > > /Mikael
> > >
> > > On Wed, Oct 9, 2024 at 5:19=E2=80=AFPM Alan Bowen <bowenalan03@gmail.com<= /a>>
> > > wrote:
> > > >
> > > > Thank you, Mikael. That is very helpful and much apprec= iated.
> > > >
> > > > What I now have is:
> > > > \startplaceformula
> > > >=C2=A0 =C2=A0\startformula
> > > >=C2=A0 =C2=A0 =C2=A0\startalign
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0\NC \[21-(9 - n^2)\NC =3D=E2= =96=A1^\prime\]=C2=A0 \NR[eq:1]
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0\NC=C2=A0 n^2+12 \NC=3D=E2=96= =A1^\prime.=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 \NR[eq:2]
> > > >=C2=A0 =C2=A0 =C2=A0\stopalign
> > > >=C2=A0 =C2=A0\stopformula
> > > > \stopplaceformula
> > > > which put the numbers at the right margin,as I wanted.<= br> > > > >
> > > > So how do I get a brace on the left rather than on the = right?=C2=A0 Or
> > > > is
> > > there documentation that explains this?
> > > >
> > > > Alan
> > > >
> > > > On Wed, Oct 9, 2024 at 10:22=E2=80=AFAM Mikael Sundqvis= t
> > > > <mickep@gmail.com>
> > > wrote:
> > > >>
> > > >> Hi,
> > > >>
> > > >> On Mon, Oct 7, 2024 at 11:45=E2=80=AFPM Alan Bowen<= br> > > > >> <bowenalan03@gmail.com>
> > > wrote:
> > > >> >
> > > >> > I have the following which works, except for t= he fact that the
> > > equation number does not go to the right margin.
> > > >> >
> > > >> > \startplaceformula
> > > >> > \startformula[align=3Dmiddle, prefix=3Dno]
> > > >> > \startcases[distance=3D2pt]
> > > >> > \NC \[21-(9 - n^2)\NC =3D=E2=96=A1^\prime\]\NR=
> > > >> > \NC\hfill n^2+12 \NC=3D=E2=96=A1^\prime.\NR[eq= 04]
> > > >> > \stopcases
> > > >> > \stopformula
> > > >> > \stopplaceformula
> > > >> >
> > > >> > I expect that I have missed something pretty b= asic here, so any
> > > guidance will be greatly appreciated.
> > > >>
> > > >> Maybe I misunderstand you, but I do not think cases= is right
> > > >> here. Also, are you sure you want to group two equa= tions but
> > > >> only number one of them.
> > > >>
> > > >> If I understand you correctly, I'd try with one= of these,
> > > >> depending on if citing the group or one of the equa= tions.
> > > >>
> > > >> \starttext
> > > >>
> > > >> \startformula
> > > >>=C2=A0 =C2=A0\startalign[location=3Dpacked,fences=3D= sesac]
> > > >>=C2=A0 =C2=A0 =C2=A0\NC \[21-(9 - n^2)\NC =3D=E2=96= =A1^\prime\]\NR
> > > >>=C2=A0 =C2=A0 =C2=A0\NC=C2=A0 n^2+12 \NC=3D=E2=96=A1= ^\prime.=C2=A0 =C2=A0 =C2=A0 =C2=A0 \NR
> > > >>=C2=A0 =C2=A0\stopalign
> > > >>=C2=A0 =C2=A0\numberhere[eq:foo]
> > > >> \stopformula
> > > >>
> > > >> \startplaceformula
> > > >>=C2=A0 =C2=A0\startformula
> > > >>=C2=A0 =C2=A0 =C2=A0\startalign
> > > >>=C2=A0 =C2=A0 =C2=A0 =C2=A0\NC \[21-(9 - n^2)\NC =3D= =E2=96=A1^\prime\]=C2=A0 \NR%[eq:bar-a]
> > > >>=C2=A0 =C2=A0 =C2=A0 =C2=A0\NC=C2=A0 n^2+12 \NC=3D= =E2=96=A1^\prime.=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 \NR[eq:bar-b]
> > > >>=C2=A0 =C2=A0 =C2=A0\stopalign
> > > >>=C2=A0 =C2=A0\stopformula
> > > >> \stopplaceformula
> > > >>
> > > >> \stoptext
> > > >>
> > > >> /Mikael
> > > >>
> ______________________________________________________________________= _____________
> If your question is of interest to others as well, please add an entry= to the Wiki!
>
> maillist : ntg= -context@ntg.nl / https://mailman.ntg.nl= /mailman3/lists/ntg-context.ntg.nl
> webpage=C2=A0 : https://www.pragma-ade.nl / https://context.aanhe= t.net (mirror)
> archive=C2=A0 : https://github.com/contextgarden/contex= t
> wiki=C2=A0 =C2=A0 =C2=A0: https://wiki.contextgarden.net
> ______________________________________________________________________= _____________
___________________________________________________________________________= ________
If your question is of interest to others as well, please add an entry to t= he Wiki!

maillist : ntg-cont= ext@ntg.nl / https://mailman.ntg.nl/mail= man3/lists/ntg-context.ntg.nl
webpage=C2=A0 : https://www.pragma-ade.nl / https://context.aanhet.net= (mirror)
archive=C2=A0 : https://github.com/contextgarden/context=
wiki=C2=A0 =C2=A0 =C2=A0: https://wiki.contextgarden.net
___________________________________________________________________________= ________
--0000000000005b9b710624482fd6-- --===============7076251537363195813== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl webpage : https://www.pragma-ade.nl / https://context.aanhet.net (mirror) archive : https://github.com/contextgarden/context wiki : https://wiki.contextgarden.net ___________________________________________________________________________________ --===============7076251537363195813==--