Changes

The cases environment consists of two columns, separated by <cmd>NC</cmd>. The second column is by default in text mode. An alternative way of getting the same result is to define the second column as a mathcolumn with <cmd>MC</cmd> like so: <texcode>\startformula f(x) = \startmathcases \NC x, \MC \text{if } 0 \le x \le \frac12 \NR \NC 1-x ,\MC \text{if } \frac12 \le x \le 1 \NR\stopmathcases\stopformula</texcode> Each line must end with a <cmd>NR</cmd>.