The [bugs] tag on the Mathematica stack exchange has 1900+ questions https://mathematica.stackexchange.com/questions/tagged/bugs https://mathematica.stackexchan

The [bugs] tag on the Mathematica stack exchange has 1900+ questions https://mathematica.stackexchange.com/questions/tagged/bugs https://mathematica.stackexchange.com/questions/tagged/bugs Here are two that I found: the character table of some finite groups weren't square https://mathematica.stackexchange.com/q/252775/7936 https://mathematica.stackexchange.com/q/252775/7936 this one makes me really nervous as this implies there's not unit testing for the most obvious checks (it's a theorem that the character table must be square and the check is trivial to implement) conjugate transpose didn't do anything to vectors https://mathematica.stackexchange.com/q/258165/7936 https://mathematica.stackexchange.com/q/258165/7936 There are plenty more where Mathematica produces the wrong antiderivative or limit.