" 
 ::Oh don't worry....not many physics students even bother with E8...When I was in 4th year, I was the only physics student who took Lie algebra. And usually only once in every two years does a physics student take that course.... only the suicidal ppl who read theory books. It was the smallest 4th yr maths class in my year. There were 7 in the class and our instructor killed off four of them in the first two weeks...'''  (') "