On Tue, Apr 6, 2010 at 4:43 PM, Hans Hagen wrote:

On 6-4-2010 10:30, Mikael Persson wrote:

...

Dear list,

I have problems with \big, \bigl, \Bigl, ...

%% Example \def\foo#1{\type{#1}: #1}

\starttext \foo{$|x|^n$} % as expected.

\foo{$\bigl|x^n\bigr|$} % expect bigger bars

\foo{$\big|x^n\big|$} % expect bigger bars

\foo{$\Bigl|x^n\Bigr|$} % too small again (but bigger than \big)

\foo{$\biggl|x^n\biggr|$} % too small again (but bigger than \big)

\foo{$\Biggl|x^n\Biggr|$} % too small again (but bigger than \big)

\foo{$\|x^n\|$} % expect two bars

\foo{$\bigl\|x^n\bigr\|$} % expect two bars and bigger ones \stoptext %%% Stop example

It gives the attached pdf file with latest minimals and mkiv.

will be fixed in next beta ... i needed to make a few more virtal shapes (in the size chain)

Great Hans, thanks! Looking forward to the new beta... Mikael

On 8-4-2010 7:40, Mikael Persson wrote:

Ok Hans, with the beta from yesterday the absolute values change size, but there are some problems still:

1) The absolute value bars are not just "straight lines" when using \big and friends, but som kind of line that is thicker in the middle. (zoom i on attached pdf)

this is because lm has no such characters so they are made from the smaller ones (extensible characters) in traditional lm this can go unniticed (depends a bit in the exact definition but in mkii you will see two stacked | just not touching but in mkiv we use overlap - which is custom in opentype anyway); so what you observe is an artefact of the viewer - it might be that future versions of luatex deal better with this as it relates somewhat with how things are dealt with in the backend but you will observe similar effects in pdftex in an earlier version i used rules but then found out that the | has round tops (ok, i could use pdf literals to draw lines but not today)

2) The horizontal spacing in the \big version seems to be bigger than for the \bigl/\bigr version (and similar for \Big vs \Bigl/\Bigr). I'd expect the same spacing (the l and r are just there for the writer to easily see what is left and what is right).

repaired .. (i also added \plainbigmathmode

3) I'd expect that \| gives double bars, like the || one get from \Vert and not |. This is not so (see the attached file). Moreover, it is not possible to do \bigl\Vert right now to get a bigger ||.

i've added double bars so this works: $\biggl\Vert x^n\biggr\Vert$ $\biggl{||} x^n\biggr{||}$ $\biggl|\biggl| x^n\biggr|\biggr|$ there will be a new beta later today or tomorrow Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------