# Re: [NTG-context] Suitable mechanism for Theorems and Definitions

Hi friends,

In David's mail I found one of the problem I had been thinking of too, and I tried his code. Unfortionately, it does not work.

I don't need it for math, but for case descriptions.

A case consists of the following elements:

Case 1    Eating fruit is healthy
Text text text - case description --

Questions:
1. abcd
2. efgh
....

1. aaa bb
2. dderere
...

...


The elements themselves I can put in blocks in order to be able to separate the q's and a's.

What I am wondering about is how to include the title in the macro.
It does not seem very difficult, but I can't figure out how.


The theorem environment seemed promising, but David's suggestion does not process. Has anyone an idea?

Kind regards,

Robert

fonts          : using map file: 8r-base.map
fonts          : using map file: ec-public-lm.map
fonts          : using map file: original-base.map
systems        : begin file tst4 at line 31
! Undefined control sequence.
\dostartLemma ...irstargument \startMathParagraph

[#1] \else \startMathParag...
l.34 ...Lemma[reference]{Algorithm xyz terminates}

?
! Undefined control sequence.
l.36 \stopLemma

David Antos wrote:

Hello Taco,

On Sun, Aug 21, 2005 at 05:43:02PM +0200, Taco Hoekwater wrote:


The "a while" turned out to be around 1999, and the code (hack) I
used back then is no longer even remotely usable (for one because
context was still in dutch, then), but I'll see if I can update my
patch.



:-), that's great :-).

In the meantime, I solved the second part, i.e., adding the additional
describing text. It goes somehow like this (well, it's a hack, but it
works):

% MathParagraph is the enumeration (it ensures references and numbering,
% and typesetting all the texts). In command, it calls a macro that refers
% to \MathParagraphType etc.

\def\startLemma{\dosingleempty\dostartLemma}
\def\dostartLemma[#1]#2 {%
\def\MathParagraphType{Lemma}
\def\MathParagraphName{#2}
\def\MathParagraphList{MathParagraphs}
\iffirstargument
\startMathParagraph[#1]
\else
\startMathParagraph
\fi
}
\let\stopLemma\stopMathParagraph

So I can use
\startLemma[reference]{Algorithm xyz terminates}
...
\stopLemma

I came to the idea to misuse command= to typeset the header and write to
the list, it is given an argument containing the number of the enumeration.
Anyway, it is not easy to feed it into \expanded{\writetolist...} as the
argument is something with \edef and a pile of pretty ugly macros :-), so I
still use \precedingsectionnumber\numberMathParagraph :-(

To sum up, a good way to obtain current enumeration number (in a form that
goes into lists, etc.)  would be completely enough, provided that one
writes hacks to solve the rest (and does end up finding the real macro
names with \tracingmacros=1 :-)). Creating something like
enumerateddescription (a description with names and possibility to write
lists) would be much nicer, of course :-))

Thank you very much,
D.A.

P.S.: Hans said once that a Dutch mathematical journal is typeset with
ConTeXt. Do you have an idea how they typeset theorems?



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