[NTG-context] Re: Strange extra space when using cases in an inner align in math

[Mikael Sundqvist <mickep@gmail.com>]

Hi Gerion,

Hans is working on the problem.

/Mikael

On Sun, Aug 25, 2024 at 4:01 PM Gerion Entrup <gerion.entrup@flump.de> wrote:
>
> Hi Mikael,
>
> your examples are simpler, that is correct, but all of them have the extra space.
> Thanks for the simpler code, I will integrate it!
>
> Gerion
>
> Am Dienstag, 20. August 2024, 12:41:45 MESZ schrieb Mikael Sundqvist:
> > Hi,
> >
> > There is indeed a space added in this case. But you do not need n=3.
> > And in fact, you do not need a simplealign either, but can use an
> > ordinary align, with location=packed. It looks like you had the wrong
> > number of \NC. I hope the examples below help, the last one is merely
> > for Hans for looking into why the relation-digit space is added there.
> >
> > /Mikael
> >
> > \definemathsimplealign[inneralign]
> >
> > \showglyphs
> > \showboxes
> >
> > \showmakeup[mathglue]
> >
> > \startdocument
> >
> > OK with \typ {n=2} instead of \typ {n=3}:
> >
> > \startformula
> >   \startalign
> >     \NC a = b \NC \NR
> >     \NC       \NC \startinneralign[n=2,align={1:right,2:left}]
> >                     \NC A      \NC = B \NR
> >                     \NC f(x,y) \NC = \startcases
> >                                        \NC 1 \NC a \NR
> >                                        \NC 1 \NC b \NR
> >                                        \NC 1 \NC b \NR
> >                                      \stopcases
> >                                        \NR
> >                   \stopinneralign
> >                   \NR
> >   \stopalign
> > \stopformula
> >
> > With align and location set to packed, instead of simplealign
> >
> > \startformula
> >   \startalign
> >     \NC a = b \NC \NR
> >     \NC       \NC \startalign[n=2,location=packed,align={1:right,2:left}]
> >                     \NC A      \NC = B \NR
> >                     \NC f(x,y) \NC = \startcases
> >                                        \NC 1 \NC a \NR
> >                                        \NC 1 \NC b \NR
> >                                        \NC 1 \NC b \NR
> >                                      \stopcases
> >                                        \NR
> >                   \stopalign
> >                   \NR
> >   \stopalign
> > \stopformula
> >
> > Extra \typ {reldig} space before the 1:
> >
> > \startformula
> > \startalign[n=3,location=packed,align={1:right,2:middle,2:left}]
> >                     \NC A      \NC = \NC B \NR
> >                     \NC f(x,y) \NC = \NC \startcases
> >                                            \NC 1 \NC a \NR
> >                                            \NC 2 \NC b \NR
> >                                          \stopcases
> >                                            \NR
> > \stopalign
> > \stopformula
> >
> > \stopdocument
> >
> > On Tue, Aug 20, 2024 at 11:55 AM Gerion Entrup <gerion.entrup@flump.de> wrote:
> > >
> > > Hi,
> > >
> > > I currently have the case of a strange extra space in math mode when using cases in inner align.
> > >
> > > Here is a MWE to demonstrate the problem:
> > > ```
> > > \definemathsimplealign[inneralign]
> > > \startdocument
> > > \startformula
> > >         \startalign
> > >                 \NC a = b \NR
> > >                 \NC \NC \startinneralign[n=3,align={1:right,2:middle,3:left}]
> > >                         \NC A \NC = \NC B \NR
> > >                         \NC f(x,y) \NC = \NC \startcases
> > >                                  \NC \text{strange}  \NC a \NR
> > >                                  \NC \text{normal}  \NC b \NR
> > >                                  \NC \text{also normal}  \NC b \NR
> > >                         \stopcases
> > >                 \stopinneralign
> > >         \stopalign
> > > \stopformula
> > > \stopdocument
> > > ```
> > >
> > > "strange" and "normal" are not aligned what I would expect but strange has more space in front of it.
> > > Is this a usage error or a bug in the math engine?
> > >
> > > Best,
> > > Gerion___________________________________________________________________________________
>
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the Wiki!
>
> maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
> webpage  : https://www.pragma-ade.nl / https://context.aanhet.net (mirror)
> archive  : https://github.com/contextgarden/context
> wiki     : https://wiki.contextgarden.net
> ___________________________________________________________________________________
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
webpage  : https://www.pragma-ade.nl / https://context.aanhet.net (mirror)
archive  : https://github.com/contextgarden/context
wiki     : https://wiki.contextgarden.net
___________________________________________________________________________________