Complex sentence: Richard Ewen Borcherds (born 29 November 1959) is a British mathematician working in quantum field theory, lattices, number theory, group theory, and infinite-dimensional algebras.
Split into simpler sentences: Richard Ewen Borcherds (born 29 November 1959) is a British mathematician currently working in quantum field theory. He is known for his work in lattices, number theory, group theory, and infinite-dimensional algebras.