Referencing eqalignno-formulas, and some more

Referencing eqalignno-formulas, and some more

[Eeri Kask]

Hello,

I started using context recently and have encountered
some difficulties where I need some help to get over.


(1) References in math formulas:

\placeformula [Ref]
\startformula
\eqalignno {
    ...
}
\stopformula

It seems that referencing to '\eqalignno'-formulas
needs some tricks. Is there any (non-)documented way
to attach a reference to a line inside '\eqalignno'
multiline formula?  E.g. a mechanism like \xxx[Ref]

\eqalignno {
    ...
    f(x) &= x^n - 1  &  \xxx[Ref]  \cr
    ...
}

so one can point to \in{formula}[Ref] and get the
correct reference number subsituted?


(2) Left/right margins of different width in doublesided
layout:  I invented my favorite layout as in

\setuplayout [location={doublesided,duplex}, marking=off,
    top=6mm, topdistance=6mm, bottom=6mm, bottomdistance=18mm,
    topspace=18mm,
    height=243mm,
    header=6mm, headerdistance=6mm,
    footer=6mm, footerdistance=18mm,
    backspace=46mm,
    width=124mm,
    leftmargin=12mm, leftmargindistance=4mm,
    leftedge=2mm, leftedgedistance=2mm,
    rightmargin=28mm, rightmargindistance=4mm,
    rightedge=6mm, rightedgedistance=2mm
]

\setuppapersize [A4][A4]
\setuppagenumbering [style=normal, alternative=doublesided, 
location={footer,middle}]
\showframe

and if '\showframe' is active I can verify by ruler that
all distances and measures etc. are drawn correctly
according to both sides of the printed sheet.
(Though it remains to be investigated why only
'backspace=46mm' gives 26mm whitespace at the left paper
edge, i.e. the distance from the left paper edge to the
left edge of the 'leftedge'.)  :-)

Putting \inmargin{Some text} on evennumbered
pages (in a doublesided setup) shows margin area width as
in 'leftmargin' in '\setuplayout';  shouldn't it adapt
itself according to doublesided layout as the margin
frame does in '\showframe'?


(3) Math formulas in footnotes result in
"Math formula deleted: Insufficient symbol fonts."
I have the same style for margins and footnotes
(I hope the following setup does this as was my
intention),

\setupfootnotes [style=\tfx\setupinterlinespace]
\setupinmargin [style=\tfx\setupinterlinespace, align=right]

and in typesetting formulas in margins this error doesn't
occur, i.e. there are sufficient symbol fonts available
(whatever it means) :-)

I am using Adobe Utopia text with Palatino math fonts.


(4) HZ-algorithm. This, as well as metafun positional graphics
and metapost color transparency, was the reason I started
trying out context.  My understanding is, HZ gets activated
not with

    \font\tenrm=cmr10 at 10pt stretch 30 shrink 20 step 10

as documented in 'pre-hz.pdf' at PRAGMA-ADE but using

    \pdffontexpand\tenrm 30 20 10 1000

as I noticed somewhere. The question is, are *.tfm files
like

    cmr10-20.tfm
    cmr10-10.tfm
    cmr10+10.tfm
    cmr10+20.tfm
    cmr10+30.tfm

enough to get it going, and can be generated manually
from *.afm files using 'afm2tfm'?

Though, '\pdffontexpand\tenrm 30 20 10 1000'  results in
"Missing font identifier."  in context...  :-)


I am using Context 2003.1.31 with pdfetex 1.10a-2.1 as
in tetex 2.0.1 distributed in SuSE Linux 8.2.



Thanks in advance for any help, item (1) is most
critical, though.


     Eeri Kask

Re: Referencing eqalignno-formulas, and some more

[Tobias Burnus]

Hello,

Eeri Kask wrote:

> (1) References in math formulas:
>
> \placeformula [Ref]
> \startformula
> \eqalignno {
>    ...
> }
> \stopformula

This should work ok. Try
\placeformula[ref]
\startformula\eqalignno{
 a &= b &\formulanumber[refa]{a}\cr
 b &=c & \subformulanumber[refb]{b}\cr
}\stopformula
\in[ref], \in[refa], \in[refb]

or

\placeformula
\startformula\eqalignno{
 a &= b &\formulanumber[ref1]\cr
 b &=c & \formulanumber[ref2]\cr
}\stopformula

\in[ref1], \in[ref2]

Tobias