Hi David,
Regarding matrices, below is an example. You can choose the names pmatrix, etc
as you wish. There is even a module which allows you to compute the product of
two matrices, etc (with \usemodule[m-matrix], see m-matrix.mkiv).
%% defining matrix with parentheses
\definemathmatrix[pmatrix]
[matrix:parentheses]
[simplecommand=pmatrix]
%% defining matrix with brackets
\definemathmatrix[bmatrix]
[matrix:brackets]
[simplecommand=bmatrix]
%% defining determinant with bars
\definemathmatrix[determinant]
[matrix:bars]
[simplecommand=thedeterminant]
\starttext
Let $A$ be the $3\times 3$ matrix defined by
\startformula
A :=
\startpmatrix
\NC 11 \NC 12 \NC 13 \NR
\NC 21 \NC 22 \NC 23 \NR
\NC 31 \NC 32 \NC 33 \NR
\stoppmatrix .
\stopformula
This matrix can also be dfined by the Matlab structure of a matrix:
\startformula
A := \pmatrix{11,12,13 ; 21, 22, 23 ; 31, 32, 33}
\stopformula
Compute the value of
\startformula
\alpha := \thedeterminant{11,12,13 ; 21, 22, 23 ; 31, 32, 33} = {\rm det}(A).
\stopformula
\stoptext
Best regards: Otared K.
> On 15 Jul 2020, at 15:38, David Eric Cox wrote:
>
> Can anyone direct me to either traditional ConTeXt math documentation on how
> to produce matrices or tell me how to show a variable in bold red in MathML?
> I am producing pdf files exclusively.
>
>
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