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It seems that \NC in mathalignment is looking ahead for the next \NR, because when I wrap the matrix in an explicit brace group it works fine again: \definemathmatrix [pmatrix] [left=\left(,right=\right)] \starttext \placeformula \startformula \startmathalignment \NC \sigma_x \NC= {\startpmatrix \NC 0 \NC 1 \NR \NC 1 \NC 0 \NR \stoppmatrix} \NR[+] \stopmathalignment \stopformula \stoptext On Tue, 2017-06-06 at 10:26 +1200, Henri Menke wrote:
Dear list,
When I have a mathmatrix inside a mathalignment the numbering using \NR[+] does not work anymore. Instead it prints "[+]" on the next line. I guess the definition of \NR from mathmatrix leaks outside. Affects both TL2017 and latest beta. MWE is below.
Cheers, Henri
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\definemathmatrix [pmatrix] [left=\left(,right=\right)]
\starttext
\startformula \startmathalignment \NC \sigma_x \NC= \startpmatrix \NC 0 \NC 1 \NR \NC 1 \NC 0 \NR \stoppmatrix \NR[+] \NC \sigma_y \NC= \startpmatrix \NC 0 \NC -i \NR \NC i \NC 0 \NR \stoppmatrix \NR[+] \NC \sigma_z \NC= \startpmatrix \NC 1 \NC 0 \NR \NC 0 \NC -1 \NR \stoppmatrix \NR[+] \stopmathalignment \stopformula
\stoptext