Re: Numbering subformulas

[Otared Kavian <otared@gmail.com>]

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Hi Wolfgang,

Thanks for having solved the problem with subformulas numbering.
I would just make a comment on your answers to Lukás, regarding the use of 
	\startsubformulas[mylabel]

Indeed using this structure instead of 
	\startsubformulas[+]
allows one to refer to all the sub-formulas by invoking (\in[mylabel]), but if one wishes to refer to any individual sub-formula one has to give a label inside the structure \start—\stop—subformulas, at the level of \placeformula for that sub-formula.
Below  is your example, with these remarks.

Thanks for your attention and help: OK
%%%% begin example
\usemodule[visual]

\starttext
Using the definition of the scalar product we infer that:
\placeformula[eq:1]
\startformula
\fakeformula
\stopformula
And here are some other relations valid in a Hilbert space:
%\startsubformulas[+]       % These two options for \subformulas
%\startsubformulas[mylabel] % enable subnumbers for the formulas

\startsubformulas
    \placeformula[eq:2-a]
    \startformula
    \fakeformula
    \stopformula

    \placeformula[eq:2-b]
    \startformula
    \fakeformula
    \stopformula

\stopsubformulas
It is clear that the equality (\in[eq:2-b]) is a consequence of (\in[eq:1]) and (\in[eq:2-a]).

% To test how to change the number separator
\defineseparatorset[none][][]
\setupformulas[numberseparatorset=none]

\startsubformulas[eq:3]
    \placeformula
    \startformula
    \fakeformula
    \stopformula

    \placeformula
    \startformula
    \fakeformula
    \stopformula

\stopsubformulas
Prove relations (\in[eq:3]) using (\in[eq:1]).
\stoptext
%%%% end example


> On 06 Aug 2015, at 12:07, Wolfgang Schuster <schuster.wolfgang@gmail.com> wrote:
> 
>> Procházka Lukáš Ing. - Pontex s. r. o. <mailto:LPr@pontex.cz>	6. August 2015 11:32
>> Hello Wolfgang, 
>> 
>> thank you for the patch (not in today's beta); I also attach the modified strc-mat.mkiv and a test file. 
>> 
>> Two questions: 
>> 
>> 1. 
>> 
>> What exactly are 
>> 
>>   %\startsubformulas[+]       % These two options for \subformulas 
>>   %\startsubformulas[mylabel] % enable subnumbers for the formulas 
>> 
>> intended for? 
>> 
>> The simple "\startsubformulas[eq:b]" meets my needs (subformulas are sub-numbered) and I can't see any difference to "\startsubformulas[+]". 
> When you write \startsubformulas[-] the numbers for the formulas aren’t displayed in the output but the counter is still increased. I guess \startsubformulas[+] is just there for completeness sake because there are other functions with “-” and “+” options as well.
> 
> One difference between \startsubformulas[+] and \startsubformulas[label] is that the second method creates a label which can be used to refer to the number of the formula.
>> 2. 
>> 
>> Is there a way to setup numbering subformulas to "(1a)" form instead of "(1.a)", i.e. set the separator to ""? 
> You have to change the separator list with the numberseparator key for \setupformulas.
> 
> \defineseparatorset[none][][]
> \setupformulas[numberseparatorset=none]
> 
> Wolfgang
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If your question is of interest to others as well, please add an entry to the Wiki!

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