I'm curious how many of these are also on the list of 'tips for success as an aspiring mathematician'. I just finished reading Benoit Mandlebrot's memoir and he

I'm curious how many of these are also on the list of 'tips for success as an aspiring mathematician'. I just finished reading Benoit Mandlebrot's memoir and he repeatedly talks about how poor academic standing is in predicting a person's ability as a researcher. As someone who is not a mathematician I'm genuinely curious.