G H Hardy
lived from
1877 to 1947

Hardy's interests covered many topics of pure mathematics:- Diophantine analysis, summation of divergent series, Fourier series, the Riemann zeta function and the distribution of primes.

He is best known for his work on Number Theory with Littlewood and Ramanujan.

See more at:   http://www-history.mcs.st-andrews.ac.uk/Biographies/Hardy.html