"You just need a certain level of knowledge (e.g., linear algebra) already and not every paper can include a full introduction into representation theory." The

"You just need a certain level of knowledge (e.g., linear algebra) already and not every paper can include a full introduction into representation theory." Then why is paper still the overwhelmingly preferred medium? Using hypertext it would be trivial to link to an external source describing the specific concept used from linear algebra. Not providing supporting links is only good for an audience that holds the entirety of mathematical knowledge in their heads (ie mathematicians in academia). The rest of the world, incl those who have since moved on like the author, don't fit into that category. Therefore, the work can only be accurately read and understood by the tiny minority of specialists capable of decoding the intent of the work. Limited reach = limited value to society. Is the intent of a PHD really to advance the field of mathematics? Or is it just another 'measuring stick' for individuals to prove to others how 'smart' they are?