Hi, I do not remember where it came from, probably AMS Math or something like that. Many thanks. It works but I am curious as to why the working code broke. On Tue, Aug 6, 2024 at 9:58 PM Mikael Sundqvist wrote:

Hi,

On Tue, Aug 6, 2024 at 5:57 PM Shiv Shankar Dayal wrote:

...

I have defined a determinant environment like below:

\definemathmatrix[determinant] [matrix:bars] [simplecommand=thedeterminant]

and I create a determinant like below:

\startformula \startdeterminant\NC a_{11} \NC a_{12} \NC a_{13} \NC \cdots \NC a_{1n}\NR \NC a_{21} \NC a_{22} \NC a_{23} \NC \cdots \NC a_{2n}\NR \NC a_{31} \NC a_{32} \NC a_{33} \NC \cdots \NC a_{3n}\NR \multispan{9}{\dotfill}\NR \NC a_{n1} \NC a_{n2} \NC a_{n3} \NC \cdots \NC a_{nn} \NR\stopdeterminant

This was working before today but I updated ConTeXt and it has stopped working. The error it gives me now is:

tex error > tex error on line 277 in file determinants.tex: You can't use '\Ustopmath' in restricted horizontal mode

How can I get it working again?

-- Respect, Shiv Shankar Dayal

I never seen \multispan before. But this seems to work:

\definemathmatrix [determinant] [matrix:bars] [simplecommand=thedeterminant]

\starttext

\startformula \startdeterminant \NC a_{11} \NC a_{12} \NC a_{13} \NC \cdots \NC a_{1n}\NR \NC a_{21} \NC a_{22} \NC a_{23} \NC \cdots \NC a_{2n}\NR \NC a_{31} \NC a_{32} \NC a_{33} \NC \cdots \NC a_{3n}\NR \HF\NR % \multispan{9}{\dotfill}\NR \NC a_{n1} \NC a_{n2} \NC a_{n3} \NC \cdots \NC a_{nn}\NR \stopdeterminant \stopformula

\stoptext

I hope it gives you what you want.

/Mikael ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki!

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-- Respect, Shiv Shankar Dayal

Mikael Sundqvist schrieb am 06.08.2024 um 18:27:

Hi,

On Tue, Aug 6, 2024 at 5:57 PM Shiv Shankar Dayal wrote:

...

I have defined a determinant environment like below:

\definemathmatrix[determinant] [matrix:bars] [simplecommand=thedeterminant]

and I create a determinant like below:

\startformula \startdeterminant\NC a_{11} \NC a_{12} \NC a_{13} \NC \cdots \NC a_{1n}\NR \NC a_{21} \NC a_{22} \NC a_{23} \NC \cdots \NC a_{2n}\NR \NC a_{31} \NC a_{32} \NC a_{33} \NC \cdots \NC a_{3n}\NR \multispan{9}{\dotfill}\NR \NC a_{n1} \NC a_{n2} \NC a_{n3} \NC \cdots \NC a_{nn} \NR\stopdeterminant

This was working before today but I updated ConTeXt and it has stopped working. The error it gives me now is:

tex error > tex error on line 277 in file determinants.tex: You can't use '\Ustopmath' in restricted horizontal mode

How can I get it working again?

-- Respect, Shiv Shankar Dayal I never seen \multispan before. But this seems to work:

\multispan is a plain TeX command to create cells which span multiple columns and makes only sense when you create tables with the \halign primitive because tables in context use hidden cells for padding on the left and right etc. Wolfgang

Shiv Shankar Dayal schrieb am 06.08.2024 um 19:30:

Hi,

I still do not know why it stopped working after the latest update.

Which version was your last one you used? Just because it worked without an error message before doesn't mean your input is the right  way. Especially when you have to pass 9 as argument to \multispan even though you have only 5 columns should be alarming. The reason for the error here is that Context creates a template for each matrix cell which enables and disable math mode at the begin of each cell but when you use \multispan the template is ignored and you have to provide your own settings. The problem no is that no math mode is entered at the begin of your new marge cell but Context always adds a end of math mode trigger when it reaches the \NR command at the end of the row. Wolfgang

Shiv Shankar Dayal schrieb am 06.08.2024 um 21:17:

LuaMetaTeX 2.11.03 20240517 + ConTeXt LMTX 2024.05.17 16:32

I had a copy of this older version and the cell handling was different back then. Still the correct way to add filler symbols in a matrix is the \HF command which has two optional commands where you can a) set the number of columns which should be filled and b) the filler alternative to be used for the symbol. Wolfgang