Hi Rainer, > tex4ht from TeXLive 2020 fails on the appended example. I append the log file > from running
I've found the issue. We recently changed definition of \[ \] to be equal to equation environment, as it is in amsmath. But this change doesn't handle nested math, which results in this issue. The solution is to use \protect\nested:math in the definition (this information is for the future reference :)) It should be fixed in TL soon. Best regards, Michal
