When I was a student at Berkeley, I had took a linear algebra class with grad student who was admitted to PhD program without any previous degrees granted. He a

When I was a student at Berkeley, I had took a linear algebra class with grad student who was admitted to PhD program without any previous degrees granted. He also was a genius and won the Putnam competition IIRC. http://math.cmu.edu/~sevakm/ http://math.cmu.edu/~sevakm/