Re: Numbering subformulas

["Procházka Lukáš Ing. - Pontex s. r. o." <LPr@pontex.cz>]

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Hello,

some more observation:

It seems (sub)numbering (sub)formulas can be achieved enclosing expressions into \start/\stop-align.

I wrote a code based on a test suite file:

	...\test\doc\context\tests\mkiv\math\formulas-001.tex

----
\starttext
   \startsubformulas[eq:sub1]
       \placeformula
           \startformula
               \startalign
                   \NC a_1 x + b_1 y \NC = c_1 \NR[eq:11]
                   \NC a_2 x + b_2 y \NC = c_2 \NR[eq:12]
               \stopalign
           \stopformula
   \stopsubformulas

   \in{eq:11}[eq:11]
   \in{eq:12}[eq:12]

   \placeformula
       \startformula
           \startsubformulas[eq:sub2]
               \startalign
                   \NC a_1 x + b_1 y \NC = c_1 \NR[eq:21]
                   \NC a_2 x + b_2 y \NC = c_2 \NR[eq:22]
               \stopalign
           \stopsubformulas
       \stopformula

   \input knuth

   \placeformula
       \startformula
           \startsubformulas[eq:sub2]
               \startalign
                   \NC a_1 x + b_1 y \NC = c_1 \NR[eq:31]
                   \NC a_2 x + b_2 y \NC = c_2 \NR[eq:32]
               \stopalign
           \stopsubformulas
       \stopformula

   \in{eq:31}[eq:31]
   \in{eq:32}[eq:32]
\stoptext
----

Problems are:

1. I am not able to make numbering of eq:31 and eq:32 continue on eq:22, so to have equations numbered:

	1a, 1b; 2a, 2b; 2c, 2d

instead of:

	1a, 1b; 2a, 2b; 3a, 3b

(Some text - here: knuth - between 2b and 3a/2c is required.)

(I played with commenting some combinations of lines but with no success.)

So - is there a way how to continue numbering subformulas (after some inserted text) - something like itemizing has \startitemize[continue]?

2. How to affect the numbering style to be "1a" instead "1.a"?

3. @Hans: The test suite file:

	...\test\doc\context\tests\mkiv\math\subformulas-001.tex

compiles, but gives "no-reference" "??".

(
The example on wiki:

	http://wiki.contextgarden.net/Math/Display#Automatic_Sub-Formula_Numbering

seems to be very ancient as it GIVES the desired result.
)

Lukas


On Mon, 03 Aug 2015 12:20:44 +0200, Procházka Lukáš Ing. - Pontex s. r. o. <LPr@pontex.cz> wrote:

> Hello,
>
> it seems this is a frequent thesis - in the mailing archive, stackoverflow...
>
> Anyway, I'm not able to find a valid way (MWE) how to number subformulas (with option to create a reference name, like 'eq:1a' and 'eq:1b', and to be able to refer to them, like "\ineq[eq:1a] and \ineq[eq:1b]"), so to get something like:
>
> "
> Some text
> 	a + b = c 	(1a)
> and later
> 	d + e = f 	(1b)
> so nothing surprising in [1a] and [1b].
> "
>
> Moreover, on http://wiki.contextgarden.net/Math there is a red "Warning!":
>
> "
> If you consider using ConTeXt for a paper with a proper formula numbering please wait until it is implemented in mkiv. At the moment only a very limited formula numbering is possilbe:
>   number formula(s) with a plain number
>   number formula(s) with a subnumber
>
> Not possible is at the moment:
>   Table of formulas
>   Named subformulas
>   Mixure of formulas and subformulas in one block
>   Reference on a (sub-)formula without having it listed in the Table of formulas
>
> For more details and actual state see mailing list and Summary of formula numbering problem.
> "
>
> I don't know which date this warning comes from, if it is outdated or still valid...
>
> So, finally, what is the PROPER way (if it really exists) in ConTeXt how to typeset subformulas?
>
> (I'm typesetting a large article on physics which contains many math (sub-)formulas, so knowledge of a working tool for Ctx would be nice...)
>
> Best regards,
>
> Lukas
>
>


-- 
Ing. Lukáš Procházka | mailto:LPr@pontex.cz
Pontex s. r. o.      | mailto:pontex@pontex.cz | http://www.pontex.cz
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147 14 Praha 4

Tel: +420 241 096 751
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system          > callbacks > not registering frozen 'find_format_file'

open source     > 1 > 1 > c:/Ctx-Beta/tex/texmf-context/tex/context/base/cont-yes.mkiv

ConTeXt  ver: 2015.07.28 19:12 MKIV beta  fmt: 2015.7.30  int: english/english

system          > 'cont-new.mkiv' loaded
open source     > 2 > 2 > c:/Ctx-Beta/tex/texmf-context/tex/context/base/cont-new.mkiv
close source    > 2 > 2 > c:/Ctx-Beta/tex/texmf-context/tex/context/base/cont-new.mkiv

system          > files > jobname 'subformulas-001', input 'C:/Lukas/ConTeXt/Test/!Ctx/test/doc/context/tests/mkiv/math/subformulas-001', result 'subformulas-001'
fonts           > latin modern fonts are not preloaded
languages       > language 'en' is active
open source     > 2 > 3 > C:/Lukas/ConTeXt/Test/!Ctx/test/doc/context/tests/mkiv/math/subformulas-001.tex
fonts           > preloading latin modern fonts (second stage)
fonts           > 'fallback modern-designsize rm 12pt' is loaded
references      > unknown reference '[][eq:second]'
backend         > xmp > using file 'c:/Ctx-Beta/tex/texmf-context/tex/context/base/lpdf-pdx.xml'
pages           > flushing realpage 1, userpage 1
close source    > 2 > 3 > C:/Lukas/ConTeXt/Test/!Ctx/test/doc/context/tests/mkiv/math/subformulas-001.tex
close source    > 1 > 3 > c:/Ctx-Beta/tex/texmf-context/tex/context/base/cont-yes.mkiv

system          > structure > start used structure

used structure  > text: subformulas-001

system          > structure > stop used structure


system          > files > start used files

used file       >    1: filename=cont-yes.mkiv filetype=tex foundname=c:/Ctx-Beta/tex/texmf-context/tex/context/base/cont-yes.mkiv usedmethod=otherwise
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used file       >    4: filename=lang-us.lua filetype=scripts foundname=c:/Ctx-Beta/tex/texmf-context/tex/context/patterns/lang-us.lua usedmethod=otherwise
used file       >    5: filename=C:/Lukas/ConTeXt/Test/!Ctx/test/doc/context/tests/mkiv/math/subformulas-001.tex foundname=C:/Lukas/ConTeXt/Test/!Ctx/test/doc/context/tests/mkiv/math/subformulas-001.tex usedmethod=direct
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used file       >    8: filename=latinmodern-math.otf filetype=opentypefonts foundname=c:/Ctx-Beta/tex/texmf/fonts/opentype/public/lm-math/latinmodern-math.otf usedmethod=otherwise
used file       >    9: filename=lmmono12-regular filetype=otf format=otf foundname=c:/Ctx-Beta/tex/texmf/fonts/opentype/public/lm/lmmono12-regular.otf usedmethod=otherwise
used file       >   10: filename=lpdf-pdx.xml filetype=tex foundname=c:/Ctx-Beta/tex/texmf-context/tex/context/base/lpdf-pdx.xml usedmethod=otherwise

system          > files > stop used files


system          > options > start commandline options

used option     > currentrun="3"
used option     > fulljobname="C:/Lukas/ConTeXt/Test/!Ctx/test/doc/context/tests/mkiv/math/subformulas-001.tex"
used option     > halt-on-error="true"
used option     > input="C:/Lukas/ConTeXt/Test/!Ctx/test/doc/context/tests/mkiv/math/subformulas-001.tex"
used option     > kindofrun="2"
used option     > maxnofruns="9"
used option     > no-parse-first-line="true"
used option     > nonstopmode="true"

system          > options > stop commandline options

system          > options > start commandline files

used file       >    1: C:/Lukas/ConTeXt/Test/!Ctx/test/doc/context/tests/mkiv/math/subformulas-001.tex

system          > options > stop commandline files


references      > start problematic references

references      > unknown >    1: [][eq:second]

references      > stop problematic references


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\starttext
  \startsubformulas[eq:sub1]
      \placeformula
          \startformula
              \startalign
                  \NC a_1 x + b_1 y \NC = c_1 \NR[eq:11]
                  \NC a_2 x + b_2 y \NC = c_2 \NR[eq:12]
              \stopalign
          \stopformula
  \stopsubformulas

  \in{eq:11}[eq:11]
  \in{eq:12}[eq:12]

  \placeformula
      \startformula
          \startsubformulas[eq:sub2]
              \startalign
                  \NC a_1 x + b_1 y \NC = c_1 \NR[eq:21]
                  \NC a_2 x + b_2 y \NC = c_2 \NR[eq:22]
              \stopalign
          \stopsubformulas
      \stopformula

  \input knuth

  \placeformula
      \startformula
          \startsubformulas[eq:sub2]
              \startalign
                  \NC a_1 x + b_1 y \NC = c_1 \NR[eq:31]
                  \NC a_2 x + b_2 y \NC = c_2 \NR[eq:32]
              \stopalign
          \stopsubformulas
      \stopformula

  \in{eq:31}[eq:31]
  \in{eq:32}[eq:32]
\stoptext



  \placeformula
    \startsubformulas[whocares:3]
      %\startformulas
        \startformula
          \startalign
            \NC 1 \NC = \text{nop} \NR[+]
            \NC 2 \NC = \text{yes plus} \NR[+]
          \stopalign
        \stopformula
      %\stopformulas
    \stopsubformulas

      \input knuth

  \placeformula
    \startsubformulas
      \startformulas
        \startformula
          \startalign
            \NC 3 \NC = \text{yes whocares:4} \NR[whocares:4]
            \NC 4 \NC = \text{nop} \NR[-]
          \stopalign
        \stopformula
      \stopformulas
    \stopsubformulas
\stoptext


\starttext
  \startsubformulas[eq:3]
    \placeformula
      \startformula
        \startalign
          \NC a \NC = a + a + a + a + a + a + a + a + a + a + a + a + a + a + a + a + a \NR[eq:11]
        \stopalign
      \stopformula

    \placeformula
      \startformula
        \startalign
          \NC b \NC = b + b + b + b + b + b + b + b + b \NR[eq:12]
        \stopalign
      \stopformula
  \stopsubformulas
\stoptext



  \startsubformulas[eq:1]
    \placeformula
      \startformula
        \startalign
          \NC a = b \NR[eq:11]
          \NC c = d \NR[eq:12]
        \stopalign
      \stopformula
  \stopsubformulas

  \if+-
    \startsubformulas[eq:sub1]
      \placeformula
        \startformula
          \startalign
            \NC a_1 x + b_1 y \NC = c_1           \NR[eq:11]
            \NC a_2 x + b_2 y \NC = c_2           \NR[eq:12]
            \NC c_2           \NC = a_2 x + b_2 y \NR[eq:13]
          \stopalign
        \stopformula

      \placeformula
        \startformula
          \startalign
            \NC a_1 x + b_1 y \NC = c_1           \NR[eq:21]
            \NC a_2 x + b_2 y \NC = c_2           \NR[eq:22]
            \NC c_2           \NC = a_2 x + b_2 y \NR[eq:23]
          \stopalign
        \stopformula
    \stopsubformulas
  \fi

  \startsubformulas[eq:3]
    \placeformula
      \startformula
        \startalign
          \NC a \NC = a + a + a + a + a + a + a + a + a + a + a + a + a + a + a + a + a \NR
        \stopalign
      \stopformula
  \stopsubformulas
\stoptext

\in{whocares:1}[whocares:1]
\in{whocares:2}[whocares:2]

\placeformula
    \startsubformulas[whocares:3]% 1a 1b 1c 1d
        \startformulas
            \startformula \startalign
                \NC 1 \NC = \text{nop} \NR
                \NC 2 \NC = \text{yes plus} \NR[+]
            \stopalign \stopformula
            \startformula \startalign
                \NC 3 \NC = \text{yes whocares:4} \NR[whocares:4]
                \NC 4 \NC = \text{nop} \NR[-]
            \stopalign \stopformula
       \stopformulas
    \stopsubformulas

\in{whocares:3}[whocares:3]
\in{whocares:4}[whocares:4]

\startsubformulas[eq:sub1]
    \placeformula
        \startformula
            \startalign
                \NC a_1 x + b_1 y \NC = c_1 \NR[eq:11]
                \NC a_2 x + b_2 y \NC = c_2 \NR[eq:12]
                \NC a_2 x + b_2 y \NC = c_2 \NR[eq:13]
            \stopalign
        \stopformula
\stopsubformulas

\in{eq:11}[eq:11]
\in{eq:12}[eq:12]
\in{eq:13}[eq:13]

\placeformula
    \startformula
        \startsubformulas[eq:sub2]
            \startalign
                \NC a_1 x + b_1 y \NC = c_1 \NR[eq:21]
                \NC a_2 x + b_2 y \NC = c_2 \NR[eq:22]
                \NC a_2 x + b_2 y \NC = c_2 \NR[eq:23]
            \stopalign
        \stopsubformulas
    \stopformula

\in{eq:21}[eq:21]
\in{eq:22}[eq:22]
\in{eq:23}[eq:23]

\placeformula
    \startformula
        \startalign
            \NC a_1 x + b_1 y \NC = c_1 \NR[eq:31]
            \NC a_2 x + b_2 y \NC = c_2 \NR[eq:32]
            \NC a_2 x + b_2 y \NC = c_2 \NR[eq:33]
        \stopalign
    \stopformula

\in{eq:31}[eq:31]
\in{eq:32}[eq:32]
\in{eq:33}[eq:33]

\stoptext

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