Speaker:   Zhao lilu,   HeFei University of Technology Title: The Waring-Goldbach problem for fourth powers and related topics Venue:   B1044 Time:   15:00, 20 Nov Abstract:   We consider the Waring-Goldbach problem for fourth powers and some related topics. In particular, it is established that every sufficiently large integer, under a natural congruence condition, can be represented as the sum of 13 fourth powers of primes. Exceptional sets for sums of cubes of primes will be also discussed.