Changes

= Border matrices with {{cmd|startbbordermatrixstartbordermatrix}} = <context source="yes">\startformula\startbordermatrix\NC \NC {\bi col 1} \NC {\bi col 2} \NC {\bi col 3}\NR\NC row 1 \NC a_{11} \NC a_{12} \NC a_{13} \NR\NC row 2 \NC a_{21} \NC a_{22} \NC a_{23} \NR\NC row 3 \NC a_{31} \NC a_{32} \NC a_{33} \NR\stopbordermatrix\stopformula </context> Use {{cmd|startbordermatrix}} for a bracketed version: