``We explore widely in the valley of ordinary representations, and we take the reader over the mountain pass leading to the valley of modular representations, t

Very roughly speaking, representation theory studies symmetry in linear spaces. It is a beautiful mathematical subject which has many applications, ranging from

Offers an introduction to four different flavours of representation theory: representations of algebras, groups, Lie algebras, and Hopf algebras. A separate par

In 1977 a symposium was held in Oxford to introduce Lie groups and their representations to non-specialists.