Le 19/05/2018 à 16:08, David L. Johnson a écrit :
But LyX doesn't understand them as delimiters unless they are written as such.
Since 2.3, LyX knows the class (mathopen, mathclose, matrel...) of the insets. This has been used actually to generalize the old code which only looked at = sign AFAIU.
JMarc
